create proper navigate event

add `set_hash` to Location

.github/actions/install/action.yml

@@ -5,7 +5,7 @@ inputs:
   zig:
     description: 'Zig version to install'
     required: false
-    default: '0.15.1'
+    default: '0.15.2'
   arch:
     description: 'CPU arch used to select the v8 lib'
     required: false

.github/workflows/zig-fmt.yml

@@ -1,7 +1,7 @@
 name: zig-fmt
 
 env:
-  ZIG_VERSION: 0.15.1
+  ZIG_VERSION: 0.15.2
 
 on:
   pull_request:

Dockerfile

@@ -1,7 +1,7 @@
 FROM debian:stable
 
 ARG MINISIG=0.12
-ARG ZIG=0.15.1
+ARG ZIG=0.15.2
 ARG ZIG_MINISIG=RWSGOq2NVecA2UPNdBUZykf1CCb147pkmdtYxgb3Ti+JO/wCYvhbAb/U
 ARG V8=14.0.365.4
 ARG ZIG_V8=v0.1.33

Makefile

@@ -96,9 +96,16 @@ wpt-summary:
 	@printf "\e[36mBuilding wpt...\e[0m\n"
 	@$(ZIG) build wpt -- --summary $(filter-out $@,$(MAKECMDGOALS)) || (printf "\e[33mBuild ERROR\e[0m\n"; exit 1;)
 
-## Test
+## Test - `grep` is used to filter out the huge compile command on build
+ifeq ($(OS), macos)
 test:
-	@TEST_FILTER='${F}' $(ZIG) build test -freference-trace --summary all
+	@script -q /dev/null sh -c 'TEST_FILTER="${F}" $(ZIG) build test -freference-trace --summary all' 2>&1 \
+		| grep --line-buffered -v "^/.*zig test -freference-trace"
+else
+test:
+	@script -qec 'TEST_FILTER="${F}" $(ZIG) build test -freference-trace --summary all' /dev/null 2>&1 \
+		| grep --line-buffered -v "^/.*zig test -freference-trace"
+endif
 
 ## Run demo/runner end to end tests
 end2end:

README.md

@@ -18,7 +18,7 @@ Lightpanda is the open-source browser made for headless usage:
 
 - Javascript execution
 - Support of Web APIs (partial, WIP)
-- Compatible with Playwright[^1], Puppeteer, chromedp through CDP
+- Compatible with Playwright[^1], Puppeteer, chromedp through [CDP](https://chromedevtools.github.io/devtools-protocol/)
 
 Fast web automation for AI agents, LLM training, scraping and testing:
 
@@ -164,7 +164,7 @@ You can also follow the progress of our Javascript support in our dedicated [zig
 
 ### Prerequisites
 
-Lightpanda is written with [Zig](https://ziglang.org/) `0.15.1`. You have to
+Lightpanda is written with [Zig](https://ziglang.org/) `0.15.2`. You have to
 install it with the right version in order to build the project.
 
 Lightpanda also depends on
@@ -190,10 +190,10 @@ For systems with [Nix](https://nixos.org/download/), you can use the devShell:
 nix develop
 ```
 
-For MacOS, you only need cmake:
+For MacOS, you need [Xcode](https://developer.apple.com/xcode/) and the following pacakges from homebrew:
 
 ```
-brew install cmake
+brew install cmake pkgconf
 ```
 
 ### Install and build dependencies

build.zig

@@ -23,7 +23,7 @@ const Build = std.Build;
 
 /// Do not rename this constant. It is scanned by some scripts to determine
 /// which zig version to install.
-const recommended_zig_version = "0.15.1";
+const recommended_zig_version = "0.15.2";
 
 pub fn build(b: *Build) !void {
     switch (comptime builtin.zig_version.order(std.SemanticVersion.parse(recommended_zig_version) catch unreachable)) {
@@ -384,6 +384,7 @@ fn addDependencies(b: *Build, mod: *Build.Module, opts: *Build.Step.Options) !vo
         try buildMbedtls(b, mod);
         try buildNghttp2(b, mod);
         try buildCurl(b, mod);
+        try buildAda(b, mod);
 
         switch (target.result.os.tag) {
             .macos => {
@@ -849,3 +850,34 @@ fn buildCurl(b: *Build, m: *Build.Module) !void {
         },
     });
 }
+
+pub fn buildAda(b: *Build, m: *Build.Module) !void {
+    const ada_dep = b.dependency("ada-singleheader", .{});
+
+    const ada_mod = b.createModule(.{
+        .root_source_file = b.path("vendor/ada/root.zig"),
+    });
+
+    const ada_lib = b.addLibrary(.{
+        .name = "ada",
+        .root_module = b.createModule(.{
+            .link_libcpp = true,
+            .target = m.resolved_target,
+            .optimize = m.optimize,
+        }),
+        .linkage = .static,
+    });
+
+    ada_lib.addCSourceFile(.{
+        .file = ada_dep.path("ada.cpp"),
+        .flags = &.{ "-std=c++20", "-O3" },
+        .language = .cpp,
+    });
+
+    ada_lib.installHeader(ada_dep.path("ada_c.h"), "ada_c.h");
+
+    // Link the library to ada module.
+    ada_mod.linkLibrary(ada_lib);
+    // Expose ada module to main module.
+    m.addImport("ada", ada_mod);
+}

build.zig.zon

@@ -5,9 +5,13 @@
     .fingerprint = 0xda130f3af836cea0,
     .dependencies = .{
         .v8 = .{
-            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/305bb3706716d32d59b2ffa674731556caa1002b.tar.gz",
-            .hash = "v8-0.0.0-xddH63bVAwBSEobaUok9J0er1FqsvEujCDDVy6ItqKQ5",
+            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/84cdca7cd9065f67c7933388f2091810fc485bc6.tar.gz",
+            .hash = "v8-0.0.0-xddH67vcAwCuN2gBsAO8TBzEw523KMroIKGrdZwc-Q-y",
         },
         //.v8 = .{ .path = "../zig-v8-fork" }
+        .@"ada-singleheader" = .{
+            .url = "https://github.com/ada-url/ada/releases/download/v3.3.0/singleheader.zip",
+            .hash = "N-V-__8AAPmhFAAw64ALjlzd5YMtzpSrmZ6KymsT84BKfB4s",
+        },
     },
 }

flake.lock

@@ -75,11 +75,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1756822655,
-        "narHash": "sha256-xQAk8xLy7srAkR5NMZFsQFioL02iTHuuEIs3ohGpgdk=",
+        "lastModified": 1760968520,
+        "narHash": "sha256-EjGslHDzCBKOVr+dnDB1CAD7wiQSHfUt3suOpFj9O1Q=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "4bdac60bfe32c41103ae500ddf894c258291dd61",
+        "rev": "e755547441a0413942a37692f7bf7fc6315bb7f6",
         "type": "github"
       },
       "original": {
@@ -136,11 +136,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1756555914,
-        "narHash": "sha256-7yoSPIVEuL+3Wzf6e7NHuW3zmruHizRrYhGerjRHTLI=",
+        "lastModified": 1760747435,
+        "narHash": "sha256-wNB/W3x+or4mdNxFPNOH5/WFckNpKgFRZk7OnOsLtm0=",
         "owner": "mitchellh",
         "repo": "zig-overlay",
-        "rev": "d0df3a2fd0f11134409d6d5ea0e510e5e477f7d6",
+        "rev": "d0f239b887b1ac736c0f3dde91bf5bf2ecf3a420",
         "type": "github"
       },
       "original": {

flake.nix

@@ -49,7 +49,7 @@
           targetPkgs =
             pkgs: with pkgs; [
               # Build Tools
-              zigpkgs."0.15.1"
+              zigpkgs."0.15.2"
               zls
               python3
               pkg-config

src/browser/css/selector.zig

@@ -562,7 +562,7 @@ pub const Selector = union(enum) {
 
                         const ntag = try n.tag();
 
-                        if (std.ascii.eqlIgnoreCase("intput", ntag)) {
+                        if (std.ascii.eqlIgnoreCase("input", ntag)) {
                             const ntype = try n.attr("type");
                             if (ntype == null) return false;
 

src/browser/dom/document.zig

@@ -17,6 +17,7 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 const std = @import("std");
+const log = @import("../../log.zig");
 
 const js = @import("../js/js.zig");
 const parser = @import("../netsurf.zig");
@@ -313,6 +314,11 @@ pub const Document = struct {
         const state = try page.getOrCreateNodeState(@ptrCast(@alignCast(self)));
         state.adopted_style_sheets = try sheets.persist();
     }
+
+    pub fn _hasFocus(_: *parser.Document) bool {
+        log.debug(.web_api, "not implemented", .{ .feature = "Document hasFocus" });
+        return true;
+    }
 };
 
 const testing = @import("../../testing.zig");

src/browser/dom/event_target.zig

@@ -34,6 +34,7 @@ pub const Union = union(enum) {
     screen_orientation: *@import("../html/screen.zig").ScreenOrientation,
     performance: *@import("performance.zig").Performance,
     media_query_list: *@import("../html/media_query_list.zig").MediaQueryList,
+    navigation: *@import("../navigation/Navigation.zig"),
 };
 
 // EventTarget implementation
@@ -82,6 +83,11 @@ pub const EventTarget = struct {
             .media_query_list => {
                 return .{ .media_query_list = @fieldParentPtr("base", @as(*parser.EventTargetTBase, @ptrCast(et))) };
             },
+            .navigation => {
+                const NavigationEventTarget = @import("../navigation/NavigationEventTarget.zig");
+                const base: *NavigationEventTarget = @fieldParentPtr("base", @as(*parser.EventTargetTBase, @ptrCast(et)));
+                return .{ .navigation = @fieldParentPtr("proto", base) };
+            },
         }
     }
 

src/browser/dom/html_collection.zig

@@ -286,7 +286,7 @@ const Opts = struct {
 
 // WEB IDL https://dom.spec.whatwg.org/#htmlcollection
 // HTMLCollection is re implemented in zig here because libdom
-// dom_html_collection expects a comparison function callback as arguement.
+// dom_html_collection expects a comparison function callback as argument.
 // But we wanted a dynamically comparison here, according to the match tagname.
 pub const HTMLCollection = struct {
     matcher: Matcher,

src/browser/dom/node.zig

@@ -360,18 +360,30 @@ pub const Node = struct {
         node: Union,
     };
     pub fn _getRootNode(self: *parser.Node, options: ?struct { composed: bool = false }, page: *Page) !GetRootNodeResult {
-        if (options) |options_| if (options_.composed) {
-            log.warn(.web_api, "not implemented", .{ .feature = "getRootNode composed" });
-        };
+        const composed = if (options) |opts| opts.composed else false;
 
-        const root = parser.nodeGetRootNode(self);
-        if (page.getNodeState(root)) |state| {
+        var current_root = parser.nodeGetRootNode(self);
+
+        while (true) {
+            const node_type = parser.nodeType(current_root);
+
+            if (node_type == .document_fragment) {
+                if (parser.documentFragmentGetHost(@ptrCast(current_root))) |host| {
+                    if (page.getNodeState(host)) |state| {
                         if (state.shadow_root) |sr| {
+                            if (!composed) {
                                 return .{ .shadow_root = sr };
                             }
+                            current_root = parser.nodeGetRootNode(@ptrCast(sr.host));
+                            continue;
+                        }
+                    }
+                }
+            }
+            break;
         }
 
-        return .{ .node = try Node.toInterface(root) };
+        return .{ .node = try Node.toInterface(current_root) };
     }
 
     pub fn _hasChildNodes(self: *parser.Node) bool {
@@ -461,7 +473,7 @@ pub const Node = struct {
 
     // Check if the hierarchy node tree constraints are respected.
     // For now, it checks only if new nodes are not self.
-    // TODO implements the others contraints.
+    // TODO implements the others constraints.
     // see https://dom.spec.whatwg.org/#concept-node-tree
     pub fn hierarchy(self: *parser.Node, nodes: []const NodeOrText) bool {
         for (nodes) |n| {

src/browser/dom/node_iterator.zig

@@ -106,7 +106,6 @@ pub const NodeIterator = struct {
         defer self.callbackEnd();
 
         if (self.pointer_before_current) {
-            self.pointer_before_current = false;
             // Unlike TreeWalker, NodeIterator starts at the first node
             if (.accept == try NodeFilter.verify(self.what_to_show, self.filter_func, self.reference_node)) {
                 self.pointer_before_current = false;
@@ -116,6 +115,7 @@ pub const NodeIterator = struct {
 
         if (try self.firstChild(self.reference_node)) |child| {
             self.reference_node = child;
+            self.pointer_before_current = false;
             return try Node.toInterface(child);
         }
 

src/browser/dom/performance.zig

@@ -195,7 +195,7 @@ test "Performance: now" {
     }
 
     var after = perf._now();
-    while (after <= now) { // Loop untill after > now
+    while (after <= now) { // Loop until after > now
         try testing.expectEqual(after, now);
         after = perf._now();
     }

src/browser/dom/range.zig

@@ -92,7 +92,7 @@ pub const Range = struct {
     pub fn _setStart(self: *Range, node: *parser.Node, offset_: i32) !void {
         try ensureValidOffset(node, offset_);
         const offset: u32 = @intCast(offset_);
-        const position = compare(node, offset, self.proto.start_node, self.proto.start_offset) catch |err| switch (err) {
+        const position = compare(node, offset, self.proto.end_node, self.proto.end_offset) catch |err| switch (err) {
             error.WrongDocument => blk: {
                 // allow a node with a different root than the current, or
                 // a disconnected one. Treat it as if it's "after", so that
@@ -103,7 +103,7 @@ pub const Range = struct {
         };
 
         if (position == 1) {
-            // if we're setting the node after the current start, the end must
+            // if we're setting the node after the current end, the end must
             // be set too.
             self.proto.end_offset = offset;
             self.proto.end_node = node;
@@ -378,7 +378,7 @@ fn compare(node_a: *parser.Node, offset_a: u32, node_b: *parser.Node, offset_b:
 
         const child_parent, const child_index = try getParentAndIndex(child);
         std.debug.assert(node_a == child_parent);
-        return if (child_index < offset_a) -1 else 1;
+        return if (offset_a <= child_index) -1 else 1;
     }
 
     return -1;

src/browser/dom/tree_walker.zig

@@ -227,7 +227,6 @@ pub const TreeWalker = struct {
                 continue;
             };
 
-
             if (!result.should_descend) {
                 // This is an .accept node - return it
                 self.current_node = result.node;

src/browser/events/composition_event.zig

@@ -0,0 +1,57 @@
+// Copyright (C) 2023-2025  Lightpanda (Selecy SAS)
+//
+// Francis Bouvier <francis@lightpanda.io>
+// Pierre Tachoire <pierre@lightpanda.io>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+const std = @import("std");
+
+const parser = @import("../netsurf.zig");
+
+// https://developer.mozilla.org/en-US/docs/Web/API/CompositionEvent
+pub const CompositionEvent = struct {
+    data: []const u8,
+    proto: parser.Event,
+
+    pub const union_make_copy = true;
+    pub const prototype = *parser.Event;
+
+    pub const ConstructorOptions = struct {
+        data: []const u8 = "",
+    };
+
+    pub fn constructor(event_type: []const u8, options_: ?ConstructorOptions) !CompositionEvent {
+        const options: ConstructorOptions = options_ orelse .{};
+
+        const event = try parser.eventCreate();
+        defer parser.eventDestroy(event);
+        try parser.eventInit(event, event_type, .{});
+        parser.eventSetInternalType(event, .composition_event);
+
+        return .{
+            .proto = event.*,
+            .data = options.data,
+        };
+    }
+
+    pub fn get_data(self: *const CompositionEvent) []const u8 {
+        return self.data;
+    }
+};
+
+const testing = @import("../../testing.zig");
+test "Browser: Events.Composition" {
+    try testing.htmlRunner("events/composition.html");
+}

src/browser/events/event.zig

@@ -17,6 +17,7 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 const std = @import("std");
+const js = @import("../js/js.zig");
 const Allocator = std.mem.Allocator;
 
 const log = @import("../../log.zig");
@@ -37,6 +38,9 @@ const KeyboardEvent = @import("keyboard_event.zig").KeyboardEvent;
 const ErrorEvent = @import("../html/error_event.zig").ErrorEvent;
 const MessageEvent = @import("../dom/MessageChannel.zig").MessageEvent;
 const PopStateEvent = @import("../html/History.zig").PopStateEvent;
+const CompositionEvent = @import("composition_event.zig").CompositionEvent;
+const NavigationCurrentEntryChangeEvent = @import("../navigation/root.zig").NavigationCurrentEntryChangeEvent;
+const NavigateEvent = @import("../navigation/root.zig").NavigateEvent;
 
 // Event interfaces
 pub const Interfaces = .{
@@ -48,6 +52,9 @@ pub const Interfaces = .{
     ErrorEvent,
     MessageEvent,
     PopStateEvent,
+    CompositionEvent,
+    NavigationCurrentEntryChangeEvent,
+    NavigateEvent,
 };
 
 pub const Union = generate.Union(Interfaces);
@@ -72,10 +79,15 @@ pub const Event = struct {
             .custom_event => .{ .CustomEvent = @as(*CustomEvent, @ptrCast(evt)).* },
             .progress_event => .{ .ProgressEvent = @as(*ProgressEvent, @ptrCast(evt)).* },
             .mouse_event => .{ .MouseEvent = @as(*parser.MouseEvent, @ptrCast(evt)) },
-            .error_event => .{ .ErrorEvent = @as(*ErrorEvent, @ptrCast(evt)).* },
+            .error_event => .{ .ErrorEvent = (@as(*ErrorEvent, @fieldParentPtr("proto", evt))).* },
             .message_event => .{ .MessageEvent = @as(*MessageEvent, @ptrCast(evt)).* },
             .keyboard_event => .{ .KeyboardEvent = @as(*parser.KeyboardEvent, @ptrCast(evt)) },
             .pop_state => .{ .PopStateEvent = @as(*PopStateEvent, @ptrCast(evt)).* },
+            .composition_event => .{ .CompositionEvent = (@as(*CompositionEvent, @fieldParentPtr("proto", evt))).* },
+            .navigation_current_entry_change_event => .{
+                .NavigationCurrentEntryChangeEvent = @as(*NavigationCurrentEntryChangeEvent, @ptrCast(evt)).*,
+            },
+            .navigate_event => .{ .NavigateEvent = @as(*NavigateEvent, @ptrCast(evt)).* },
         };
     }
 
@@ -223,8 +235,6 @@ pub const EventHandler = struct {
     node: parser.EventNode,
     listener: *parser.EventListener,
 
-    const js = @import("../js/js.zig");
-
     pub const Listener = union(enum) {
         function: js.Function,
         object: js.Object,
@@ -396,6 +406,40 @@ const SignalCallback = struct {
     }
 };
 
+pub fn DirectEventHandler(
+    comptime TargetT: type,
+    target: *TargetT,
+    event_type: []const u8,
+    maybe_listener: ?EventHandler.Listener,
+    cb: *?js.Function,
+    page_arena: std.mem.Allocator,
+) !void {
+    const event_target = parser.toEventTarget(TargetT, target);
+
+    // Check if we have a listener set.
+    if (cb.*) |callback| {
+        const listener = try parser.eventTargetHasListener(event_target, event_type, false, callback.id);
+        std.debug.assert(listener != null);
+        try parser.eventTargetRemoveEventListener(event_target, event_type, listener.?, false);
+    }
+
+    if (maybe_listener) |listener| {
+        switch (listener) {
+            // If an object is given as listener, do nothing.
+            .object => {},
+            .function => |callback| {
+                _ = try EventHandler.register(page_arena, event_target, event_type, listener, null) orelse unreachable;
+                cb.* = callback;
+
+                return;
+            },
+        }
+    }
+
+    // Just unset the listener.
+    cb.* = null;
+}
+
 const testing = @import("../../testing.zig");
 test "Browser: Event" {
     try testing.htmlRunner("events/event.html");

src/browser/file/Blob.zig

@@ -0,0 +1,284 @@
+// Copyright (C) 2023-2025  Lightpanda (Selecy SAS)
+//
+// Francis Bouvier <francis@lightpanda.io>
+// Pierre Tachoire <pierre@lightpanda.io>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+const std = @import("std");
+const Writer = std.Io.Writer;
+
+const Page = @import("../page.zig").Page;
+const js = @import("../js/js.zig");
+
+const ReadableStream = @import("../streams/ReadableStream.zig");
+
+/// https://w3c.github.io/FileAPI/#blob-section
+/// https://developer.mozilla.org/en-US/docs/Web/API/Blob
+const Blob = @This();
+
+/// Immutable slice of blob.
+/// Note that another blob may hold a pointer/slice to this,
+/// so its better to leave the deallocation of it to arena allocator.
+slice: []const u8,
+/// MIME attached to blob. Can be an empty string.
+mime: []const u8,
+
+const ConstructorOptions = struct {
+    /// MIME type.
+    type: []const u8 = "",
+    /// How to handle line endings (CR and LF).
+    /// `transparent` means do nothing, `native` expects CRLF (\r\n) on Windows.
+    endings: []const u8 = "transparent",
+};
+
+/// Creates a new Blob.
+pub fn constructor(
+    maybe_blob_parts: ?[]const []const u8,
+    maybe_options: ?ConstructorOptions,
+    page: *Page,
+) !Blob {
+    const options: ConstructorOptions = maybe_options orelse .{};
+    // Setup MIME; This can be any string according to my observations.
+    const mime: []const u8 = blk: {
+        const t = options.type;
+        if (t.len == 0) {
+            break :blk "";
+        }
+
+        break :blk try page.arena.dupe(u8, t);
+    };
+
+    if (maybe_blob_parts) |blob_parts| {
+        var w: Writer.Allocating = .init(page.arena);
+        const use_native_endings = std.mem.eql(u8, options.endings, "native");
+        try writeBlobParts(&w.writer, blob_parts, use_native_endings);
+
+        return .{ .slice = w.written(), .mime = mime };
+    }
+
+    // We don't have `blob_parts`, why would you want a Blob anyway then?
+    return .{ .slice = "", .mime = mime };
+}
+
+const largest_vector = @max(std.simd.suggestVectorLength(u8) orelse 1, 8);
+/// Array of possible vector sizes for the current arch in decrementing order.
+/// We may move this to some file for SIMD helpers in the future.
+const vector_sizes = blk: {
+    // Required for length calculation.
+    var n: usize = largest_vector;
+    var total: usize = 0;
+    while (n != 2) : (n /= 2) total += 1;
+    // Populate an array with vector sizes.
+    n = largest_vector;
+    var i: usize = 0;
+    var items: [total]usize = undefined;
+    while (n != 2) : (n /= 2) {
+        defer i += 1;
+        items[i] = n;
+    }
+
+    break :blk items;
+};
+
+/// Writes blob parts to given `Writer` with desired endings.
+fn writeBlobParts(
+    writer: *Writer,
+    blob_parts: []const []const u8,
+    use_native_endings: bool,
+) !void {
+    // Transparent.
+    if (!use_native_endings) {
+        for (blob_parts) |part| {
+            try writer.writeAll(part);
+        }
+
+        return;
+    }
+
+    // TODO: Windows support.
+
+    // Linux & Unix.
+    // Both Firefox and Chrome implement it as such:
+    // CRLF => LF
+    // CR   => LF
+    // So even though CR is not followed by LF, it gets replaced.
+    //
+    // I believe this is because such scenario is possible:
+    // ```
+    // let parts = [ "the quick\r", "\nbrown fox" ];
+    // ```
+    // In the example, one should have to check the part before in order to
+    // understand that CRLF is being presented in the final buffer.
+    // So they took a simpler approach, here's what given blob parts produce:
+    // ```
+    // "the quick\n\nbrown fox"
+    // ```
+    scan_parts: for (blob_parts) |part| {
+        var end: usize = 0;
+
+        inline for (vector_sizes) |vector_len| {
+            const Vec = @Vector(vector_len, u8);
+
+            while (end + vector_len <= part.len) : (end += vector_len) {
+                const cr: Vec = @splat('\r');
+                // Load chunk as vectors.
+                const slice = part[end..][0..vector_len];
+                const chunk: Vec = slice.*;
+                // Look for CR.
+                const match = chunk == cr;
+
+                // Create a bitset out of match vector.
+                const bitset = std.bit_set.IntegerBitSet(vector_len){
+                    .mask = @bitCast(@intFromBool(match)),
+                };
+
+                var iter = bitset.iterator(.{});
+                var relative_start: usize = 0;
+                while (iter.next()) |index| {
+                    _ = try writer.writeVec(&.{ slice[relative_start..index], "\n" });
+
+                    if (index + 1 != slice.len and slice[index + 1] == '\n') {
+                        relative_start = index + 2;
+                    } else {
+                        relative_start = index + 1;
+                    }
+                }
+
+                _ = try writer.writeVec(&.{slice[relative_start..]});
+            }
+        }
+
+        // Scalar scan fallback.
+        var relative_start: usize = end;
+        while (end < part.len) {
+            if (part[end] == '\r') {
+                _ = try writer.writeVec(&.{ part[relative_start..end], "\n" });
+
+                // Part ends with CR. We can continue to next part.
+                if (end + 1 == part.len) {
+                    continue :scan_parts;
+                }
+
+                // If next char is LF, skip it too.
+                if (part[end + 1] == '\n') {
+                    relative_start = end + 2;
+                } else {
+                    relative_start = end + 1;
+                }
+            }
+
+            end += 1;
+        }
+
+        // Write the remaining. We get this in such situations:
+        // `the quick brown\rfox`
+        // `the quick brown\r\nfox`
+        try writer.writeAll(part[relative_start..end]);
+    }
+}
+
+/// Returns a Promise that resolves with the contents of the blob
+/// as binary data contained in an ArrayBuffer.
+pub fn _arrayBuffer(self: *const Blob, page: *Page) !js.Promise {
+    return page.js.resolvePromise(js.ArrayBuffer{ .values = self.slice });
+}
+
+/// Returns a ReadableStream which upon reading returns the data
+/// contained within the Blob.
+pub fn _stream(self: *const Blob, page: *Page) !*ReadableStream {
+    const stream = try ReadableStream.constructor(null, null, page);
+    try stream.queue.append(page.arena, .{
+        .uint8array = .{ .values = self.slice },
+    });
+    return stream;
+}
+
+/// Returns a Promise that resolves with a string containing
+/// the contents of the blob, interpreted as UTF-8.
+pub fn _text(self: *const Blob, page: *Page) !js.Promise {
+    return page.js.resolvePromise(self.slice);
+}
+
+/// Extension to Blob; works on Firefox and Safari.
+/// https://developer.mozilla.org/en-US/docs/Web/API/Blob/bytes
+/// Returns a Promise that resolves with a Uint8Array containing
+/// the contents of the blob as an array of bytes.
+pub fn _bytes(self: *const Blob, page: *Page) !js.Promise {
+    return page.js.resolvePromise(js.TypedArray(u8){ .values = self.slice });
+}
+
+/// Returns a new Blob object which contains data
+/// from a subset of the blob on which it's called.
+pub fn _slice(
+    self: *const Blob,
+    maybe_start: ?i32,
+    maybe_end: ?i32,
+    maybe_content_type: ?[]const u8,
+    page: *Page,
+) !Blob {
+    const mime: []const u8 = blk: {
+        if (maybe_content_type) |content_type| {
+            if (content_type.len == 0) {
+                break :blk "";
+            }
+
+            break :blk try page.arena.dupe(u8, content_type);
+        }
+
+        break :blk "";
+    };
+
+    const slice = self.slice;
+    if (maybe_start) |_start| {
+        const start = blk: {
+            if (_start < 0) {
+                break :blk slice.len -| @abs(_start);
+            }
+
+            break :blk @min(slice.len, @as(u31, @intCast(_start)));
+        };
+
+        const end: usize = blk: {
+            if (maybe_end) |_end| {
+                if (_end < 0) {
+                    break :blk @max(start, slice.len -| @abs(_end));
+                }
+
+                break :blk @min(slice.len, @max(start, @as(u31, @intCast(_end))));
+            }
+
+            break :blk slice.len;
+        };
+
+        return .{ .slice = slice[start..end], .mime = mime };
+    }
+
+    return .{ .slice = slice, .mime = mime };
+}
+
+/// Returns the size of the Blob in bytes.
+pub fn get_size(self: *const Blob) usize {
+    return self.slice.len;
+}
+
+/// Returns the type of Blob; likely a MIME type, yet anything can be given.
+pub fn get_type(self: *const Blob) []const u8 {
+    return self.mime;
+}
+
+const testing = @import("../../testing.zig");
+test "Browser: File.Blob" {
+    try testing.htmlRunner("file/blob.html");
+}

src/browser/file/File.zig

@@ -21,14 +21,12 @@ const std = @import("std");
 // https://w3c.github.io/FileAPI/#file-section
 const File = @This();
 
-// Very incomplete. The prototype for this is Blob, which we don't have.
-// This minimum "implementation" is added because some JavaScript code just
-// checks: if (x instanceof File) throw Error(...)
+/// TODO: Implement File API.
 pub fn constructor() File {
     return .{};
 }
 
 const testing = @import("../../testing.zig");
-test "Browser: File" {
-    try testing.htmlRunner("xhr/file.html");
+test "Browser: File.File" {
+    try testing.htmlRunner("file/file.html");
 }

src/browser/file/root.zig

@@ -0,0 +1,7 @@
+//! File API.
+//! https://developer.mozilla.org/en-US/docs/Web/API/File_API
+
+pub const Interfaces = .{
+    @import("./Blob.zig"),
+    @import("./File.zig"),
+};

src/browser/html/History.zig

@@ -21,140 +21,79 @@ const log = @import("../../log.zig");
 
 const js = @import("../js/js.zig");
 const Page = @import("../page.zig").Page;
+const Window = @import("window.zig").Window;
 
 // https://html.spec.whatwg.org/multipage/nav-history-apis.html#the-history-interface
 const History = @This();
 
-const HistoryEntry = struct {
-    url: []const u8,
-    // This is serialized as JSON because
-    // History must survive a JsContext.
-    state: ?[]u8,
-};
-
 const ScrollRestorationMode = enum {
+    pub const ENUM_JS_USE_TAG = true;
+
     auto,
     manual,
-
-    pub fn fromString(str: []const u8) ?ScrollRestorationMode {
-        for (std.enums.values(ScrollRestorationMode)) |mode| {
-            if (std.ascii.eqlIgnoreCase(str, @tagName(mode))) {
-                return mode;
-            }
-        } else {
-            return null;
-        }
-    }
-
-    pub fn toString(self: ScrollRestorationMode) []const u8 {
-        return @tagName(self);
-    }
 };
 
 scroll_restoration: ScrollRestorationMode = .auto,
-stack: std.ArrayListUnmanaged(HistoryEntry) = .empty,
-current: ?usize = null,
 
-pub fn get_length(self: *History) u32 {
-    return @intCast(self.stack.items.len);
+pub fn get_length(_: *History, page: *Page) u32 {
+    return @intCast(page.session.navigation.entries.items.len);
 }
 
 pub fn get_scrollRestoration(self: *History) ScrollRestorationMode {
     return self.scroll_restoration;
 }
 
-pub fn set_scrollRestoration(self: *History, mode: []const u8) void {
-    self.scroll_restoration = ScrollRestorationMode.fromString(mode) orelse self.scroll_restoration;
+pub fn set_scrollRestoration(self: *History, mode: ScrollRestorationMode) void {
+    self.scroll_restoration = mode;
 }
 
-pub fn get_state(self: *History, page: *Page) !?js.Value {
-    if (self.current) |curr| {
-        const entry = self.stack.items[curr];
-        if (entry.state) |state| {
+pub fn get_state(_: *History, page: *Page) !?js.Value {
+    if (page.session.navigation.currentEntry().state) |state| {
         const value = try js.Value.fromJson(page.js, state);
         return value;
     } else {
         return null;
     }
-    } else {
-        return null;
-    }
 }
 
-pub fn pushNavigation(self: *History, _url: []const u8, page: *Page) !void {
+pub fn _pushState(_: *const History, state: js.Object, _: ?[]const u8, _url: ?[]const u8, page: *Page) !void {
     const arena = page.session.arena;
-    const url = try arena.dupe(u8, _url);
+    const url = if (_url) |u| try arena.dupe(u8, u) else try arena.dupe(u8, page.url.raw);
 
-    const entry = HistoryEntry{ .state = null, .url = url };
-    try self.stack.append(arena, entry);
-    self.current = self.stack.items.len - 1;
+    const json = state.toJson(arena) catch return error.DataClone;
+    _ = try page.session.navigation.pushEntry(url, json, page, true);
 }
 
-pub fn dispatchPopStateEvent(state: ?[]const u8, page: *Page) void {
-    log.debug(.script_event, "dispatch popstate event", .{
-        .type = "popstate",
-        .source = "history",
-    });
-    History._dispatchPopStateEvent(state, page) catch |err| {
-        log.err(.app, "dispatch popstate event error", .{
-            .err = err,
-            .type = "popstate",
-            .source = "history",
-        });
-    };
-}
-
-fn _dispatchPopStateEvent(state: ?[]const u8, page: *Page) !void {
-    var evt = try PopStateEvent.constructor("popstate", .{ .state = state });
-
-    _ = try parser.eventTargetDispatchEvent(
-        @as(*parser.EventTarget, @ptrCast(&page.window)),
-        &evt.proto,
-    );
-}
-
-pub fn _pushState(self: *History, state: js.Object, _: ?[]const u8, _url: ?[]const u8, page: *Page) !void {
+pub fn _replaceState(_: *const History, state: js.Object, _: ?[]const u8, _url: ?[]const u8, page: *Page) !void {
     const arena = page.session.arena;
 
+    const entry = page.session.navigation.currentEntry();
     const json = try state.toJson(arena);
     const url = if (_url) |u| try arena.dupe(u8, u) else try arena.dupe(u8, page.url.raw);
-    const entry = HistoryEntry{ .state = json, .url = url };
-    try self.stack.append(arena, entry);
-    self.current = self.stack.items.len - 1;
+
+    entry.state = json;
+    entry.url = url;
 }
 
-pub fn _replaceState(self: *History, state: js.Object, _: ?[]const u8, _url: ?[]const u8, page: *Page) !void {
-    const arena = page.session.arena;
-
-    if (self.current) |curr| {
-        const entry = &self.stack.items[curr];
-        const json = try state.toJson(arena);
-        const url = if (_url) |u| try arena.dupe(u8, u) else try arena.dupe(u8, page.url.raw);
-        entry.* = HistoryEntry{ .state = json, .url = url };
-    } else {
-        try self._pushState(state, "", _url, page);
-    }
-}
-
-pub fn go(self: *History, delta: i32, page: *Page) !void {
+pub fn go(_: *const History, delta: i32, page: *Page) !void {
     // 0 behaves the same as no argument, both reloading the page.
-    // If this is getting called, there SHOULD be an entry, atleast from pushNavigation.
-    const current = self.current.?;
 
+    const current = page.session.navigation.index;
     const index_s: i64 = @intCast(@as(i64, @intCast(current)) + @as(i64, @intCast(delta)));
-    if (index_s < 0 or index_s > self.stack.items.len - 1) {
+    if (index_s < 0 or index_s > page.session.navigation.entries.items.len - 1) {
         return;
     }
 
     const index = @as(usize, @intCast(index_s));
-    const entry = self.stack.items[index];
-    self.current = index;
+    const entry = page.session.navigation.entries.items[index];
 
-    if (try page.isSameOrigin(entry.url)) {
-        History.dispatchPopStateEvent(entry.state, page);
+    if (entry.url) |url| {
+        if (try page.isSameOrigin(url)) {
+            PopStateEvent.dispatch(entry.state, page);
+        }
     }
 
-    try page.navigateFromWebAPI(entry.url, .{ .reason = .history });
+    _ = try page.session.navigation.navigate(entry.url, .{ .traverse = index }, page);
 }
 
 pub fn _go(self: *History, _delta: ?i32, page: *Page) !void {
@@ -207,9 +146,38 @@ pub const PopStateEvent = struct {
             return null;
         }
     }
+
+    pub fn dispatch(state: ?[]const u8, page: *Page) void {
+        log.debug(.script_event, "dispatch popstate event", .{
+            .type = "popstate",
+            .source = "history",
+        });
+
+        var evt = PopStateEvent.constructor("popstate", .{ .state = state }) catch |err| {
+            log.err(.app, "event constructor error", .{
+                .err = err,
+                .type = "popstate",
+                .source = "history",
+            });
+
+            return;
+        };
+
+        _ = parser.eventTargetDispatchEvent(
+            parser.toEventTarget(Window, &page.window),
+            &evt.proto,
+        ) catch |err| {
+            log.err(.app, "dispatch popstate event error", .{
+                .err = err,
+                .type = "popstate",
+                .source = "history",
+            });
+        };
+    }
 };
 
 const testing = @import("../../testing.zig");
 test "Browser: HTML.History" {
-    try testing.htmlRunner("html/history.html");
+    try testing.htmlRunner("html/history/history.html");
+    try testing.htmlRunner("html/history/history2.html");
 }

src/browser/html/document.zig

@@ -42,12 +42,12 @@ pub const HTMLDocument = struct {
     // JS funcs
     // --------
 
-    pub fn get_domain(self: *parser.DocumentHTML, page: *Page) ![]const u8 {
+    pub fn get_domain(self: *parser.DocumentHTML) ![]const u8 {
         // libdom's document_html get_domain always returns null, this is
         // the way MDN recommends getting the domain anyways, since document.domain
         // is deprecated.
         const location = try parser.documentHTMLGetLocation(Location, self) orelse return "";
-        return location.get_host(page);
+        return location.get_host();
     }
 
     pub fn set_domain(_: *parser.DocumentHTML, _: []const u8) ![]const u8 {
@@ -195,7 +195,7 @@ pub const HTMLDocument = struct {
     }
 
     pub fn set_location(_: *const parser.DocumentHTML, url: []const u8, page: *Page) !void {
-        return page.navigateFromWebAPI(url, .{ .reason = .script });
+        return page.navigateFromWebAPI(url, .{ .reason = .script }, .{ .push = null });
     }
 
     pub fn get_designMode(_: *parser.DocumentHTML) []const u8 {

src/browser/html/elements.zig

@@ -218,36 +218,36 @@ pub const HTMLAnchorElement = struct {
     }
 
     pub fn get_href(self: *parser.Anchor) ![]const u8 {
-        return try parser.anchorGetHref(self);
+        return parser.anchorGetHref(self);
     }
 
     pub fn set_href(self: *parser.Anchor, href: []const u8, page: *const Page) !void {
         const full = try urlStitch(page.call_arena, href, page.url.raw, .{});
-        return try parser.anchorSetHref(self, full);
+        return parser.anchorSetHref(self, full);
     }
 
     pub fn get_hreflang(self: *parser.Anchor) ![]const u8 {
-        return try parser.anchorGetHrefLang(self);
+        return parser.anchorGetHrefLang(self);
     }
 
     pub fn set_hreflang(self: *parser.Anchor, href: []const u8) !void {
-        return try parser.anchorSetHrefLang(self, href);
+        return parser.anchorSetHrefLang(self, href);
     }
 
     pub fn get_type(self: *parser.Anchor) ![]const u8 {
-        return try parser.anchorGetType(self);
+        return parser.anchorGetType(self);
     }
 
     pub fn set_type(self: *parser.Anchor, t: []const u8) !void {
-        return try parser.anchorSetType(self, t);
+        return parser.anchorSetType(self, t);
     }
 
     pub fn get_rel(self: *parser.Anchor) ![]const u8 {
-        return try parser.anchorGetRel(self);
+        return parser.anchorGetRel(self);
     }
 
     pub fn set_rel(self: *parser.Anchor, t: []const u8) !void {
-        return try parser.anchorSetRel(self, t);
+        return parser.anchorSetRel(self, t);
     }
 
     pub fn get_text(self: *parser.Anchor) !?[]const u8 {
@@ -269,182 +269,175 @@ pub const HTMLAnchorElement = struct {
         if (try parser.elementGetAttribute(@ptrCast(@alignCast(self)), "href")) |href| {
             return URL.constructor(.{ .string = href }, null, page); // TODO inject base url
         }
-        return .empty;
+        return error.NotProvided;
     }
 
-    // TODO return a disposable string
     pub fn get_origin(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return try u.get_origin(page);
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+        return u.get_origin(page);
     }
 
-    // TODO return a disposable string
     pub fn get_protocol(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return u.get_protocol();
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+
+        return page.call_arena.dupe(u8, u.get_protocol());
     }
 
-    pub fn set_protocol(self: *parser.Anchor, v: []const u8, page: *Page) !void {
-        const arena = page.arena;
+    pub fn set_protocol(self: *parser.Anchor, protocol: []const u8, page: *Page) !void {
         var u = try url(self, page);
+        defer u.destructor();
+        try u.set_protocol(protocol);
 
-        u.uri.scheme = v;
-        const href = try u.toString(arena);
-        try parser.anchorSetHref(self, href);
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
-    // TODO return a disposable string
     pub fn get_host(self: *parser.Anchor, page: *Page) ![]const u8 {
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+
+        return page.call_arena.dupe(u8, u.get_host());
+    }
+
+    pub fn set_host(self: *parser.Anchor, host: []const u8, page: *Page) !void {
         var u = try url(self, page);
-        return try u.get_host(page);
-    }
+        defer u.destructor();
+        try u.set_host(host);
 
-    pub fn set_host(self: *parser.Anchor, v: []const u8, page: *Page) !void {
-        // search : separator
-        var p: ?u16 = null;
-        var h: []const u8 = undefined;
-        for (v, 0..) |c, i| {
-            if (c == ':') {
-                h = v[0..i];
-                p = try std.fmt.parseInt(u16, v[i + 1 ..], 10);
-                break;
-            }
-        }
-
-        const arena = page.arena;
-        var u = try url(self, page);
-
-        if (p) |pp| {
-            u.uri.host = .{ .raw = h };
-            u.uri.port = pp;
-        } else {
-            u.uri.host = .{ .raw = v };
-            u.uri.port = null;
-        }
-
-        const href = try u.toString(arena);
-        try parser.anchorSetHref(self, href);
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
     pub fn get_hostname(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return u.get_hostname();
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+        return page.call_arena.dupe(u8, u.get_hostname());
     }
 
-    pub fn set_hostname(self: *parser.Anchor, v: []const u8, page: *Page) !void {
-        const arena = page.arena;
+    pub fn set_hostname(self: *parser.Anchor, hostname: []const u8, page: *Page) !void {
         var u = try url(self, page);
-        u.uri.host = .{ .raw = v };
-        const href = try u.toString(arena);
-        try parser.anchorSetHref(self, href);
+        defer u.destructor();
+        try u.set_hostname(hostname);
+
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
-    // TODO return a disposable string
     pub fn get_port(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return try u.get_port(page);
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+        return page.call_arena.dupe(u8, u.get_port());
     }
 
-    pub fn set_port(self: *parser.Anchor, v: ?[]const u8, page: *Page) !void {
-        const arena = page.arena;
+    pub fn set_port(self: *parser.Anchor, maybe_port: ?[]const u8, page: *Page) !void {
         var u = try url(self, page);
+        defer u.destructor();
 
-        if (v != null and v.?.len > 0) {
-            u.uri.port = try std.fmt.parseInt(u16, v.?, 10);
+        if (maybe_port) |port| {
+            try u.set_port(port);
         } else {
-            u.uri.port = null;
+            u.clearPort();
         }
 
-        const href = try u.toString(arena);
-        try parser.anchorSetHref(self, href);
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
-    // TODO return a disposable string
     pub fn get_username(self: *parser.Anchor, page: *Page) ![]const u8 {
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+
+        const username = u.get_username();
+        if (username.len == 0) {
+            return "";
+        }
+
+        return page.call_arena.dupe(u8, username);
+    }
+
+    pub fn set_username(self: *parser.Anchor, maybe_username: ?[]const u8, page: *Page) !void {
         var u = try url(self, page);
-        return u.get_username();
+        defer u.destructor();
+
+        const username = if (maybe_username) |username| username else "";
+        try u.set_username(username);
+
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
-    pub fn set_username(self: *parser.Anchor, v: ?[]const u8, page: *Page) !void {
-        const arena = page.arena;
-        var u = try url(self, page);
-
-        if (v) |vv| {
-            u.uri.user = .{ .raw = vv };
-        } else {
-            u.uri.user = null;
-        }
-        const href = try u.toString(arena);
-
-        try parser.anchorSetHref(self, href);
-    }
-
-    // TODO return a disposable string
     pub fn get_password(self: *parser.Anchor, page: *Page) ![]const u8 {
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+
+        return page.call_arena.dupe(u8, u.get_password());
+    }
+
+    pub fn set_password(self: *parser.Anchor, maybe_password: ?[]const u8, page: *Page) !void {
         var u = try url(self, page);
-        return try page.arena.dupe(u8, u.get_password());
+        defer u.destructor();
+
+        const password = if (maybe_password) |password| password else "";
+        try u.set_password(password);
+
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
-    pub fn set_password(self: *parser.Anchor, v: ?[]const u8, page: *Page) !void {
-        const arena = page.arena;
-        var u = try url(self, page);
-
-        if (v) |vv| {
-            u.uri.password = .{ .raw = vv };
-        } else {
-            u.uri.password = null;
-        }
-        const href = try u.toString(arena);
-
-        try parser.anchorSetHref(self, href);
-    }
-
-    // TODO return a disposable string
     pub fn get_pathname(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return u.get_pathname();
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+
+        return page.call_arena.dupe(u8, u.get_pathname());
     }
 
-    pub fn set_pathname(self: *parser.Anchor, v: []const u8, page: *Page) !void {
-        const arena = page.arena;
+    pub fn set_pathname(self: *parser.Anchor, pathname: []const u8, page: *Page) !void {
         var u = try url(self, page);
-        u.uri.path = .{ .raw = v };
-        const href = try u.toString(arena);
+        defer u.destructor();
 
-        try parser.anchorSetHref(self, href);
+        try u.set_pathname(pathname);
+
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
     pub fn get_search(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return try u.get_search(page);
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+        // This allocates in page arena so no need to dupe.
+        return u.get_search(page);
     }
 
     pub fn set_search(self: *parser.Anchor, v: ?[]const u8, page: *Page) !void {
         var u = try url(self, page);
+        defer u.destructor();
         try u.set_search(v, page);
 
-        const href = try u.toString(page.call_arena);
-        try parser.anchorSetHref(self, href);
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 
-    // TODO return a disposable string
     pub fn get_hash(self: *parser.Anchor, page: *Page) ![]const u8 {
-        var u = try url(self, page);
-        return try u.get_hash(page);
+        var u = url(self, page) catch return "";
+        defer u.destructor();
+
+        return page.call_arena.dupe(u8, u.get_hash());
     }
 
-    pub fn set_hash(self: *parser.Anchor, v: ?[]const u8, page: *Page) !void {
-        const arena = page.arena;
+    pub fn set_hash(self: *parser.Anchor, maybe_hash: ?[]const u8, page: *Page) !void {
         var u = try url(self, page);
+        defer u.destructor();
 
-        if (v) |vv| {
-            u.uri.fragment = .{ .raw = vv };
+        if (maybe_hash) |hash| {
+            try u.set_hash(hash);
         } else {
-            u.uri.fragment = null;
+            u.clearHash();
         }
-        const href = try u.toString(arena);
 
-        try parser.anchorSetHref(self, href);
+        const href = try u._toString(page);
+        return parser.anchorSetHref(self, href);
     }
 };
 
@@ -732,6 +725,9 @@ pub const HTMLInputElement = struct {
     pub fn set_value(self: *parser.Input, value: []const u8) !void {
         try parser.inputSetValue(self, value);
     }
+    pub fn _select(_: *parser.Input) void {
+        log.debug(.web_api, "not implemented", .{ .feature = "HTMLInputElement select" });
+    }
 };
 
 pub const HTMLLIElement = struct {
@@ -1354,6 +1350,7 @@ test "Browser: HTML.HtmlScriptElement" {
     try testing.htmlRunner("html/script/import.html");
     try testing.htmlRunner("html/script/dynamic_import.html");
     try testing.htmlRunner("html/script/importmap.html");
+    try testing.htmlRunner("html/script/order.html");
 }
 
 test "Browser: HTML.HtmlSlotElement" {

src/browser/html/error_event.zig

@@ -42,7 +42,7 @@ pub const ErrorEvent = struct {
         const event = try parser.eventCreate();
         defer parser.eventDestroy(event);
         try parser.eventInit(event, event_type, .{});
-        parser.eventSetInternalType(event, .event);
+        parser.eventSetInternalType(event, .error_event);
 
         const o = opts orelse ErrorEventInit{};
 

src/browser/html/location.zig

@@ -16,8 +16,7 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-const Uri = @import("std").Uri;
-
+const std = @import("std");
 const Page = @import("../page.zig").Page;
 const URL = @import("../url/url.zig").URL;
 
@@ -25,36 +24,55 @@ const URL = @import("../url/url.zig").URL;
 pub const Location = struct {
     url: URL,
 
+    /// Initializes the `Location` to be used in `Window`.
     /// Browsers give such initial values when user not navigated yet:
     /// Chrome  -> chrome://new-tab-page/
     /// Firefox -> about:newtab
     /// Safari  -> favorites://
-    pub const default = Location{
-        .url = .initWithoutSearchParams(Uri.parse("about:blank") catch unreachable),
-    };
+    pub fn init(url: []const u8) !Location {
+        return .{ .url = try .initForLocation(url) };
+    }
 
     pub fn get_href(self: *Location, page: *Page) ![]const u8 {
         return self.url.get_href(page);
     }
 
     pub fn set_href(_: *const Location, href: []const u8, page: *Page) !void {
-        return page.navigateFromWebAPI(href, .{ .reason = .script });
+        return page.navigateFromWebAPI(href, .{ .reason = .script }, .{ .push = null });
+    }
+
+    pub fn set_hash(_: *const Location, hash: []const u8, page: *Page) !void {
+        const normalized_hash = blk: {
+            if (hash.len == 0) {
+                const old_url = page.url.raw;
+
+                break :blk if (std.mem.indexOfScalar(u8, old_url, '#')) |index|
+                    old_url[0..index]
+                else
+                    old_url;
+            } else if (hash[0] == '#')
+                break :blk hash
+            else
+                break :blk try std.fmt.allocPrint(page.arena, "#{s}", .{hash});
+        };
+
+        return page.navigateFromWebAPI(normalized_hash, .{ .reason = .script }, .replace);
     }
 
     pub fn get_protocol(self: *Location) []const u8 {
         return self.url.get_protocol();
     }
 
-    pub fn get_host(self: *Location, page: *Page) ![]const u8 {
-        return self.url.get_host(page);
+    pub fn get_host(self: *Location) []const u8 {
+        return self.url.get_host();
     }
 
     pub fn get_hostname(self: *Location) []const u8 {
         return self.url.get_hostname();
     }
 
-    pub fn get_port(self: *Location, page: *Page) ![]const u8 {
-        return self.url.get_port(page);
+    pub fn get_port(self: *Location) []const u8 {
+        return self.url.get_port();
     }
 
     pub fn get_pathname(self: *Location) []const u8 {
@@ -65,8 +83,8 @@ pub const Location = struct {
         return self.url.get_search(page);
     }
 
-    pub fn get_hash(self: *Location, page: *Page) ![]const u8 {
-        return self.url.get_hash(page);
+    pub fn get_hash(self: *Location) []const u8 {
+        return self.url.get_hash();
     }
 
     pub fn get_origin(self: *Location, page: *Page) ![]const u8 {
@@ -74,19 +92,19 @@ pub const Location = struct {
     }
 
     pub fn _assign(_: *const Location, url: []const u8, page: *Page) !void {
-        return page.navigateFromWebAPI(url, .{ .reason = .script });
+        return page.navigateFromWebAPI(url, .{ .reason = .script }, .{ .push = null });
     }
 
     pub fn _replace(_: *const Location, url: []const u8, page: *Page) !void {
-        return page.navigateFromWebAPI(url, .{ .reason = .script });
+        return page.navigateFromWebAPI(url, .{ .reason = .script }, .replace);
     }
 
     pub fn _reload(_: *const Location, page: *Page) !void {
-        return page.navigateFromWebAPI(page.url.raw, .{ .reason = .script });
+        return page.navigateFromWebAPI(page.url.raw, .{ .reason = .script }, .reload);
     }
 
     pub fn _toString(self: *Location, page: *Page) ![]const u8 {
-        return try self.get_href(page);
+        return self.get_href(page);
     }
 };
 

src/browser/html/svg_elements.zig

@@ -25,7 +25,7 @@ pub const SVGElement = struct {
     // Currently the prototype chain is not implemented (will not be returned by toInterface())
     // For that we need parser.SvgElement and the derived types with tags in the v-table.
     pub const prototype = *Element;
-    // While this is a Node, could consider not exposing the subtype untill we have
+    // While this is a Node, could consider not exposing the subtype until we have
     // a Self type to cast to.
     pub const subtype = .node;
 };

src/browser/html/window.zig

@@ -25,6 +25,7 @@ const Page = @import("../page.zig").Page;
 
 const Navigator = @import("navigator.zig").Navigator;
 const History = @import("History.zig");
+const Navigation = @import("../navigation/Navigation.zig");
 const Location = @import("location.zig").Location;
 const Crypto = @import("../crypto/crypto.zig").Crypto;
 const Console = @import("../console/console.zig").Console;
@@ -41,6 +42,9 @@ const Request = @import("../fetch/Request.zig");
 const fetchFn = @import("../fetch/fetch.zig").fetch;
 
 const storage = @import("../storage/storage.zig");
+const ErrorEvent = @import("error_event.zig").ErrorEvent;
+
+const DirectEventHandler = @import("../events/event.zig").DirectEventHandler;
 
 // https://dom.spec.whatwg.org/#interface-window-extensions
 // https://html.spec.whatwg.org/multipage/nav-history-apis.html#window
@@ -52,7 +56,7 @@ pub const Window = struct {
 
     document: *parser.DocumentHTML,
     target: []const u8 = "",
-    location: Location = .default,
+    location: Location,
     storage_shelf: ?*storage.Shelf = null,
 
     // counter for having unique timer ids
@@ -68,6 +72,7 @@ pub const Window = struct {
     scroll_x: u32 = 0,
     scroll_y: u32 = 0,
     onload_callback: ?js.Function = null,
+    onpopstate_callback: ?js.Function = null,
 
     pub fn create(target: ?[]const u8, navigator: ?Navigator) !Window {
         var fbs = std.io.fixedBufferStream("");
@@ -78,6 +83,7 @@ pub const Window = struct {
         return .{
             .document = html_doc,
             .target = target orelse "",
+            .location = try .init("about:blank"),
             .navigator = navigator orelse .{},
             .performance = Performance.init(),
         };
@@ -88,6 +94,10 @@ pub const Window = struct {
         try parser.documentHTMLSetLocation(Location, self.document, &self.location);
     }
 
+    pub fn changeLocation(self: *Window, new_url: []const u8, page: *Page) !void {
+        return self.location.url.reinit(new_url, page);
+    }
+
     pub fn replaceDocument(self: *Window, doc: *parser.DocumentHTML) !void {
         self.performance.reset(); // When to reset see: https://developer.mozilla.org/en-US/docs/Web/API/Performance/timeOrigin
         self.document = doc;
@@ -109,31 +119,17 @@ pub const Window = struct {
 
     /// Sets `onload_callback`.
     pub fn set_onload(self: *Window, maybe_listener: ?EventHandler.Listener, page: *Page) !void {
-        const event_target = parser.toEventTarget(Window, self);
-        const event_type = "load";
-
-        // Check if we have a listener set.
-        if (self.onload_callback) |callback| {
-            const listener = try parser.eventTargetHasListener(event_target, event_type, false, callback.id);
-            std.debug.assert(listener != null);
-            try parser.eventTargetRemoveEventListener(event_target, event_type, listener.?, false);
+        try DirectEventHandler(Window, self, "load", maybe_listener, &self.onload_callback, page.arena);
     }
 
-        if (maybe_listener) |listener| {
-            switch (listener) {
-                // If an object is given as listener, do nothing.
-                .object => {},
-                .function => |callback| {
-                    _ = try EventHandler.register(page.arena, event_target, event_type, listener, null) orelse unreachable;
-                    self.onload_callback = callback;
-
-                    return;
-                },
-            }
+    /// Returns `onpopstate_callback`.
+    pub fn get_onpopstate(self: *const Window) ?js.Function {
+        return self.onpopstate_callback;
     }
 
-        // Just unset the listener.
-        self.onload_callback = null;
+    /// Sets `onpopstate_callback`.
+    pub fn set_onpopstate(self: *Window, maybe_listener: ?EventHandler.Listener, page: *Page) !void {
+        try DirectEventHandler(Window, self, "popstate", maybe_listener, &self.onpopstate_callback, page.arena);
     }
 
     pub fn get_location(self: *Window) *Location {
@@ -141,7 +137,7 @@ pub const Window = struct {
     }
 
     pub fn set_location(_: *const Window, url: []const u8, page: *Page) !void {
-        return page.navigateFromWebAPI(url, .{ .reason = .script });
+        return page.navigateFromWebAPI(url, .{ .reason = .script }, .{ .push = null });
     }
 
     // frames return the window itself, but accessing it via a pseudo
@@ -189,6 +185,10 @@ pub const Window = struct {
         return &page.session.history;
     }
 
+    pub fn get_navigation(_: *Window, page: *Page) *Navigation {
+        return &page.session.navigation;
+    }
+
     //  The interior height of the window in pixels, including the height of the horizontal scroll bar, if present.
     pub fn get_innerHeight(_: *Window, page: *Page) u32 {
         // We do not have scrollbars or padding so this is the same as Element.clientHeight
@@ -247,8 +247,8 @@ pub const Window = struct {
         _ = self.timers.remove(id);
     }
 
-    pub fn _queueMicrotask(self: *Window, cbk: js.Function, page: *Page) !u32 {
-        return self.createTimeout(cbk, 0, page, .{ .name = "queueMicrotask" });
+    pub fn _queueMicrotask(self: *Window, cbk: js.Function, page: *Page) !void {
+        _ = try self.createTimeout(cbk, 0, page, .{ .name = "queueMicrotask" });
     }
 
     pub fn _setImmediate(self: *Window, cbk: js.Function, page: *Page) !u32 {
@@ -281,6 +281,25 @@ pub const Window = struct {
         return out;
     }
 
+    pub fn _reportError(self: *Window, err: js.Object, page: *Page) !void {
+        var error_event = try ErrorEvent.constructor("error", .{
+            .@"error" = err,
+        });
+        _ = try parser.eventTargetDispatchEvent(
+            parser.toEventTarget(Window, self),
+            @as(*parser.Event, &error_event.proto),
+        );
+
+        if (parser.eventDefaultPrevented(&error_event.proto) == false) {
+            const err_string = err.toString() catch "Unknown error";
+            log.info(.user_script, "error", .{
+                .err = err_string,
+                .stack = page.stackTrace() catch "???",
+                .source = "window.reportError",
+            });
+        }
+    }
+
     const CreateTimeoutOpts = struct {
         name: []const u8,
         args: []js.Object = &.{},

src/browser/js/Context.zig

@@ -262,7 +262,7 @@ pub fn module(self: *Context, comptime want_result: bool, src: []const u8, url:
                 const owned_specifier = try self.arena.dupeZ(u8, normalized_specifier);
                 gop.key_ptr.* = owned_specifier;
                 gop.value_ptr.* = .{};
-                try self.script_manager.?.getModule(owned_specifier, url);
+                try self.script_manager.?.preloadImport(owned_specifier, url);
             }
         }
     }
@@ -750,9 +750,16 @@ pub fn jsValueToZig(self: *Context, comptime named_function: NamedFunction, comp
             unreachable;
         },
         .@"enum" => |e| {
+            if (@hasDecl(T, "ENUM_JS_USE_TAG")) {
+                const str = try self.jsValueToZig(named_function, []const u8, js_value);
+                return std.meta.stringToEnum(T, str) orelse return error.InvalidEnumValue;
+            } else {
                 switch (@typeInfo(e.tag_type)) {
                     .int => return std.meta.intToEnum(T, try jsIntToZig(e.tag_type, js_value, self.v8_context)),
-                else => @compileError(named_function.full_name ++ " has an unsupported enum parameter type: " ++ @typeName(T)),
+                    else => {
+                        @compileError(named_function.full_name ++ " has an unsupported enum parameter type: " ++ @typeName(T));
+                    },
+                }
             }
         },
         else => {},
@@ -1206,17 +1213,17 @@ fn _resolveModuleCallback(self: *Context, referrer: v8.Module, specifier: []cons
         // harm in handling this case.
         @branchHint(.unlikely);
         gop.value_ptr.* = .{};
-        try self.script_manager.?.getModule(normalized_specifier, referrer_path);
+        try self.script_manager.?.preloadImport(normalized_specifier, referrer_path);
     }
 
-    var fetch_result = try self.script_manager.?.waitForModule(normalized_specifier);
-    defer fetch_result.deinit();
+    var source = try self.script_manager.?.waitForImport(normalized_specifier);
+    defer source.deinit();
 
     var try_catch: js.TryCatch = undefined;
     try_catch.init(self);
     defer try_catch.deinit();
 
-    const entry = self.module(true, fetch_result.src(), normalized_specifier, true) catch |err| {
+    const entry = self.module(true, source.src(), normalized_specifier, true) catch |err| {
         switch (err) {
             error.EvaluationError => {
                 // This is a sentinel value telling us that the error was already
@@ -1290,7 +1297,7 @@ fn _dynamicModuleCallback(self: *Context, specifier: [:0]const u8, referrer: []c
         };
 
         // Next, we need to actually load it.
-        self.script_manager.?.getAsyncModule(specifier, dynamicModuleSourceCallback, state, referrer) catch |err| {
+        self.script_manager.?.getAsyncImport(specifier, dynamicModuleSourceCallback, state, referrer) catch |err| {
             const error_msg = v8.String.initUtf8(isolate, @errorName(err));
             _ = resolver.reject(self.v8_context, error_msg.toValue());
         };
@@ -1323,24 +1330,24 @@ fn _dynamicModuleCallback(self: *Context, specifier: [:0]const u8, referrer: []c
     return promise;
 }
 
-fn dynamicModuleSourceCallback(ctx: *anyopaque, fetch_result_: anyerror!ScriptManager.GetResult) void {
+fn dynamicModuleSourceCallback(ctx: *anyopaque, module_source_: anyerror!ScriptManager.ModuleSource) void {
     const state: *DynamicModuleResolveState = @ptrCast(@alignCast(ctx));
     var self = state.context;
 
-    var fetch_result = fetch_result_ catch |err| {
+    var ms = module_source_ catch |err| {
         const error_msg = v8.String.initUtf8(self.isolate, @errorName(err));
         _ = state.resolver.castToPromiseResolver().reject(self.v8_context, error_msg.toValue());
         return;
     };
 
     const module_entry = blk: {
-        defer fetch_result.deinit();
+        defer ms.deinit();
 
         var try_catch: js.TryCatch = undefined;
         try_catch.init(self);
         defer try_catch.deinit();
 
-        break :blk self.module(true, fetch_result.src(), state.specifier, true) catch {
+        break :blk self.module(true, ms.src(), state.specifier, true) catch {
             const ex = try_catch.exception(self.call_arena) catch |err| @errorName(err) orelse "unknown error";
             log.err(.js, "module compilation failed", .{
                 .specifier = state.specifier,

src/browser/js/Inspector.zig

@@ -28,7 +28,14 @@ pub fn init(allocator: Allocator, isolate: v8.Isolate, ctx: anytype) !Inspector
     // If necessary, turn a void context into something we can safely ptrCast
     const safe_context: *anyopaque = if (ContextT == void) @ptrCast(@constCast(&{})) else ctx;
 
-    const channel = v8.InspectorChannel.init(safe_context, InspectorContainer.onInspectorResponse, InspectorContainer.onInspectorEvent, isolate);
+    const channel = v8.InspectorChannel.init(
+        safe_context,
+        InspectorContainer.onInspectorResponse,
+        InspectorContainer.onInspectorEvent,
+        InspectorContainer.onRunMessageLoopOnPause,
+        InspectorContainer.onQuitMessageLoopOnPause,
+        isolate,
+    );
 
     const client = v8.InspectorClient.init();
 
@@ -109,6 +116,8 @@ pub fn getNodePtr(self: *const Inspector, allocator: Allocator, object_id: []con
 const NoopInspector = struct {
     pub fn onInspectorResponse(_: *anyopaque, _: u32, _: []const u8) void {}
     pub fn onInspectorEvent(_: *anyopaque, _: []const u8) void {}
+    pub fn onRunMessageLoopOnPause(_: *anyopaque, _: u32) void {}
+    pub fn onQuitMessageLoopOnPause(_: *anyopaque) void {}
 };
 
 pub fn getTaggedAnyOpaque(value: v8.Value) ?*js.TaggedAnyOpaque {

src/browser/js/js.zig

@@ -58,6 +58,10 @@ pub fn TypedArray(comptime T: type) type {
     };
 }
 
+pub const ArrayBuffer = struct {
+    values: []const u8,
+};
+
 pub const PromiseResolver = struct {
     context: *Context,
     resolver: v8.PromiseResolver,
@@ -324,6 +328,19 @@ pub fn simpleZigValueToJs(isolate: v8.Isolate, value: anytype, comptime fail: bo
         },
         .@"struct" => {
             const T = @TypeOf(value);
+
+            if (T == ArrayBuffer) {
+                const values = value.values;
+                const len = values.len;
+                var array_buffer: v8.ArrayBuffer = undefined;
+                const backing_store = v8.BackingStore.init(isolate, len);
+                const data: [*]u8 = @ptrCast(@alignCast(backing_store.getData()));
+                @memcpy(data[0..len], @as([]const u8, @ptrCast(values))[0..len]);
+                array_buffer = v8.ArrayBuffer.initWithBackingStore(isolate, &backing_store.toSharedPtr());
+
+                return .{ .handle = array_buffer.handle };
+            }
+
             if (@hasDecl(T, "_TYPED_ARRAY_ID_KLUDGE")) {
                 const values = value.values;
                 const value_type = @typeInfo(@TypeOf(values)).pointer.child;
@@ -378,8 +395,13 @@ pub fn simpleZigValueToJs(isolate: v8.Isolate, value: anytype, comptime fail: bo
         .@"enum" => {
             const T = @TypeOf(value);
             if (@hasDecl(T, "toString")) {
+                // This should be deprecated in favor of the ENUM_JS_USE_TAG.
                 return simpleZigValueToJs(isolate, value.toString(), fail);
             }
+
+            if (@hasDecl(T, "ENUM_JS_USE_TAG")) {
+                return simpleZigValueToJs(isolate, @tagName(value), fail);
+            }
         },
         else => {},
     }

src/browser/js/types.zig

@@ -16,8 +16,9 @@ const Interfaces = generate.Tuple(.{
     @import("../storage/storage.zig").Interfaces,
     @import("../url/url.zig").Interfaces,
     @import("../xhr/xhr.zig").Interfaces,
+    @import("../navigation/root.zig").Interfaces,
+    @import("../file/root.zig").Interfaces,
     @import("../xhr/form_data.zig").Interfaces,
-    @import("../xhr/File.zig"),
     @import("../xmlserializer/xmlserializer.zig").Interfaces,
     @import("../fetch/fetch.zig").Interfaces,
     @import("../streams/streams.zig").Interfaces,

src/browser/navigation/Navigation.zig

@@ -0,0 +1,328 @@
+// Copyright (C) 2023-2024  Lightpanda (Selecy SAS)
+//
+// Francis Bouvier <francis@lightpanda.io>
+// Pierre Tachoire <pierre@lightpanda.io>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+const std = @import("std");
+const log = @import("../../log.zig");
+const URL = @import("../../url.zig").URL;
+
+const js = @import("../js/js.zig");
+const Page = @import("../page.zig").Page;
+
+const DirectEventHandler = @import("../events/event.zig").DirectEventHandler;
+const EventTarget = @import("../dom/event_target.zig").EventTarget;
+const EventHandler = @import("../events/event.zig").EventHandler;
+
+const parser = @import("../netsurf.zig");
+
+// https://developer.mozilla.org/en-US/docs/Web/API/Navigation
+const Navigation = @This();
+
+const NavigationKind = @import("root.zig").NavigationKind;
+const NavigationHistoryEntry = @import("root.zig").NavigationHistoryEntry;
+const NavigationTransition = @import("root.zig").NavigationTransition;
+const NavigationCurrentEntryChangeEvent = @import("root.zig").NavigationCurrentEntryChangeEvent;
+
+const NavigationEventTarget = @import("NavigationEventTarget.zig");
+
+pub const prototype = *NavigationEventTarget;
+proto: NavigationEventTarget = NavigationEventTarget{},
+
+index: usize = 0,
+// Need to be stable pointers, because Events can reference entries.
+entries: std.ArrayListUnmanaged(*NavigationHistoryEntry) = .empty,
+next_entry_id: usize = 0,
+
+pub fn resetForNewPage(self: *Navigation) void {
+    // libdom will automatically clean this up when a new page is made.
+    // We must create a new target whenever we create a new page.
+    self.proto = NavigationEventTarget{};
+}
+
+pub fn get_canGoBack(self: *const Navigation) bool {
+    return self.index > 0;
+}
+
+pub fn get_canGoForward(self: *const Navigation) bool {
+    return self.entries.items.len > self.index + 1;
+}
+
+pub fn currentEntry(self: *Navigation) *NavigationHistoryEntry {
+    return self.entries.items[self.index];
+}
+
+pub fn get_currentEntry(self: *Navigation) *NavigationHistoryEntry {
+    return self.currentEntry();
+}
+
+pub fn get_transition(_: *const Navigation) ?NavigationTransition {
+    // For now, all transitions are just considered complete.
+    return null;
+}
+
+const NavigationReturn = struct {
+    committed: js.Promise,
+    finished: js.Promise,
+};
+
+pub fn _back(self: *Navigation, page: *Page) !NavigationReturn {
+    if (!self.get_canGoBack()) {
+        return error.InvalidStateError;
+    }
+
+    const new_index = self.index - 1;
+    const next_entry = self.entries.items[new_index];
+    self.index = new_index;
+
+    return self.navigate(next_entry.url, .{ .traverse = new_index }, page);
+}
+
+pub fn _entries(self: *const Navigation) []*NavigationHistoryEntry {
+    return self.entries.items;
+}
+
+pub fn _forward(self: *Navigation, page: *Page) !NavigationReturn {
+    if (!self.get_canGoForward()) {
+        return error.InvalidStateError;
+    }
+
+    const new_index = self.index + 1;
+    const next_entry = self.entries.items[new_index];
+    self.index = new_index;
+
+    return self.navigate(next_entry.url, .{ .traverse = new_index }, page);
+}
+
+pub fn updateEntries(self: *Navigation, url: []const u8, kind: NavigationKind, page: *Page, dispatch: bool) !void {
+    switch (kind) {
+        .replace => {
+            _ = try self.replaceEntry(url, null, page, dispatch);
+        },
+        .push => |state| {
+            _ = try self.pushEntry(url, state, page, dispatch);
+        },
+        .traverse => |index| {
+            self.index = index;
+        },
+        .reload => {},
+    }
+}
+
+// This is for after true navigation processing, where we need to ensure that our entries are up to date.
+// This is only really safe to run in the `pageDoneCallback` where we can guarantee that the URL and NavigationKind are correct.
+pub fn processNavigation(self: *Navigation, page: *Page) !void {
+    const url = page.url.raw;
+    const kind: NavigationKind = page.session.navigation_kind orelse .{ .push = null };
+    try self.updateEntries(url, kind, page, false);
+}
+
+/// Pushes an entry into the Navigation stack WITHOUT actually navigating to it.
+/// For that, use `navigate`.
+pub fn pushEntry(self: *Navigation, _url: []const u8, state: ?[]const u8, page: *Page, dispatch: bool) !*NavigationHistoryEntry {
+    const arena = page.session.arena;
+
+    const url = try arena.dupe(u8, _url);
+
+    // truncates our history here.
+    if (self.entries.items.len > self.index + 1) {
+        self.entries.shrinkRetainingCapacity(self.index + 1);
+    }
+
+    const index = self.entries.items.len;
+
+    const id = self.next_entry_id;
+    self.next_entry_id += 1;
+
+    const id_str = try std.fmt.allocPrint(arena, "{d}", .{id});
+
+    const entry = try arena.create(NavigationHistoryEntry);
+    entry.* = NavigationHistoryEntry{
+        .id = id_str,
+        .key = id_str,
+        .url = url,
+        .state = state,
+    };
+
+    // we don't always have a current entry...
+    const previous = if (self.entries.items.len > 0) self.currentEntry() else null;
+    try self.entries.append(arena, entry);
+    if (previous) |prev| {
+        if (dispatch) {
+            NavigationCurrentEntryChangeEvent.dispatch(self, prev, .push);
+        }
+    }
+
+    self.index = index;
+
+    return entry;
+}
+
+pub fn replaceEntry(self: *Navigation, _url: []const u8, state: ?[]const u8, page: *Page, dispatch: bool) !*NavigationHistoryEntry {
+    const arena = page.session.arena;
+    const url = try arena.dupe(u8, _url);
+
+    const previous = self.currentEntry();
+
+    const id = self.next_entry_id;
+    self.next_entry_id += 1;
+    const id_str = try std.fmt.allocPrint(arena, "{d}", .{id});
+
+    const entry = try arena.create(NavigationHistoryEntry);
+    entry.* = NavigationHistoryEntry{
+        .id = id_str,
+        .key = id_str,
+        .url = url,
+        .state = state,
+    };
+
+    self.entries.items[self.index] = entry;
+
+    if (dispatch) {
+        NavigationCurrentEntryChangeEvent.dispatch(self, previous, .replace);
+    }
+
+    return entry;
+}
+
+const NavigateOptions = struct {
+    const NavigateOptionsHistory = enum {
+        pub const ENUM_JS_USE_TAG = true;
+
+        auto,
+        push,
+        replace,
+    };
+
+    state: ?js.Object = null,
+    info: ?js.Object = null,
+    history: NavigateOptionsHistory = .auto,
+};
+
+pub fn navigate(
+    self: *Navigation,
+    _url: ?[]const u8,
+    kind: NavigationKind,
+    page: *Page,
+) !NavigationReturn {
+    const arena = page.session.arena;
+    const url = _url orelse return error.MissingURL;
+
+    // https://github.com/WICG/navigation-api/issues/95
+    //
+    // These will only settle on same-origin navigation (mostly intended for SPAs).
+    // It is fine (and expected) for these to not settle on cross-origin requests :)
+    const committed = try page.js.createPromiseResolver(.page);
+    const finished = try page.js.createPromiseResolver(.page);
+
+    const new_url_string = try URL.stitch(arena, url, page.url.raw, .{});
+    const new_url = try URL.parse(new_url_string, null);
+
+    const is_same_document = try page.url.eqlDocument(&new_url, arena);
+
+    switch (kind) {
+        .push => |state| {
+            if (is_same_document) {
+                page.url = new_url;
+
+                try committed.resolve({});
+                // todo: Fire navigate event
+                try finished.resolve({});
+
+                _ = try self.pushEntry(url, state, page, true);
+            } else {
+                try page.navigateFromWebAPI(url, .{ .reason = .navigation }, kind);
+            }
+        },
+        .traverse => |index| {
+            self.index = index;
+
+            if (is_same_document) {
+                page.url = new_url;
+
+                try committed.resolve({});
+                // todo: Fire navigate event
+                try finished.resolve({});
+            } else {
+                try page.navigateFromWebAPI(url, .{ .reason = .navigation }, kind);
+            }
+        },
+        .reload => {
+            try page.navigateFromWebAPI(url, .{ .reason = .navigation }, kind);
+        },
+        else => unreachable,
+    }
+
+    return .{
+        .committed = committed.promise(),
+        .finished = finished.promise(),
+    };
+}
+
+pub fn _navigate(self: *Navigation, _url: []const u8, _opts: ?NavigateOptions, page: *Page) !NavigationReturn {
+    const opts = _opts orelse NavigateOptions{};
+    const json = if (opts.state) |state| state.toJson(page.session.arena) catch return error.DataClone else null;
+    return try self.navigate(_url, .{ .push = json }, page);
+}
+
+pub const ReloadOptions = struct {
+    state: ?js.Object = null,
+    info: ?js.Object = null,
+};
+
+pub fn _reload(self: *Navigation, _opts: ?ReloadOptions, page: *Page) !NavigationReturn {
+    const arena = page.session.arena;
+
+    const opts = _opts orelse ReloadOptions{};
+    const entry = self.currentEntry();
+    if (opts.state) |state| {
+        const previous = entry;
+        entry.state = state.toJson(arena) catch return error.DataClone;
+        NavigationCurrentEntryChangeEvent.dispatch(self, previous, .reload);
+    }
+
+    return self.navigate(entry.url, .reload, page);
+}
+
+pub const TraverseToOptions = struct {
+    info: ?js.Object = null,
+};
+
+pub fn _traverseTo(self: *Navigation, key: []const u8, _opts: ?TraverseToOptions, page: *Page) !NavigationReturn {
+    if (_opts != null) {
+        log.debug(.browser, "not implemented", .{ .options = _opts });
+    }
+
+    for (self.entries.items, 0..) |entry, i| {
+        if (std.mem.eql(u8, key, entry.key)) {
+            return try self.navigate(entry.url, .{ .traverse = i }, page);
+        }
+    }
+
+    return error.InvalidStateError;
+}
+
+pub const UpdateCurrentEntryOptions = struct {
+    state: js.Object,
+};
+
+pub fn _updateCurrentEntry(self: *Navigation, options: UpdateCurrentEntryOptions, page: *Page) !void {
+    const arena = page.session.arena;
+
+    const previous = self.currentEntry();
+    self.currentEntry().state = options.state.toJson(arena) catch return error.DataClone;
+    NavigationCurrentEntryChangeEvent.dispatch(self, previous, null);
+}

src/browser/navigation/NavigationEventTarget.zig

@@ -0,0 +1,58 @@
+const std = @import("std");
+
+const js = @import("../js/js.zig");
+const Page = @import("../page.zig").Page;
+
+const EventTarget = @import("../dom/event_target.zig").EventTarget;
+const EventHandler = @import("../events/event.zig").EventHandler;
+
+const parser = @import("../netsurf.zig");
+
+pub const NavigationEventTarget = @This();
+
+pub const prototype = *EventTarget;
+// Extend libdom event target for pure zig struct.
+base: parser.EventTargetTBase = parser.EventTargetTBase{ .internal_target_type = .navigation },
+
+oncurrententrychange_cbk: ?js.Function = null,
+
+fn register(
+    self: *NavigationEventTarget,
+    alloc: std.mem.Allocator,
+    typ: []const u8,
+    listener: EventHandler.Listener,
+) !?js.Function {
+    const target = parser.toEventTarget(NavigationEventTarget, self);
+
+    // The only time this can return null if the listener is already
+    // registered. But before calling `register`, all of our functions
+    // remove any existing listener, so it should be impossible to get null
+    // from this function call.
+    const eh = (try EventHandler.register(alloc, target, typ, listener, null)) orelse unreachable;
+    return eh.callback;
+}
+
+fn unregister(self: *NavigationEventTarget, typ: []const u8, cbk_id: usize) !void {
+    const et = parser.toEventTarget(NavigationEventTarget, self);
+    // check if event target has already this listener
+    const lst = try parser.eventTargetHasListener(et, typ, false, cbk_id);
+    if (lst == null) {
+        return;
+    }
+
+    // remove listener
+    try parser.eventTargetRemoveEventListener(et, typ, lst.?, false);
+}
+
+pub fn get_oncurrententrychange(self: *NavigationEventTarget) ?js.Function {
+    return self.oncurrententrychange_cbk;
+}
+
+pub fn set_oncurrententrychange(self: *NavigationEventTarget, listener: ?EventHandler.Listener, page: *Page) !void {
+    if (self.oncurrententrychange_cbk) |cbk| try self.unregister("currententrychange", cbk.id);
+    if (listener) |listen| {
+        self.oncurrententrychange_cbk = try self.register(page.arena, "currententrychange", listen);
+    } else {
+        self.oncurrententrychange_cbk = null;
+    }
+}

src/browser/navigation/root.zig

@@ -0,0 +1,347 @@
+// Copyright (C) 2023-2024  Lightpanda (Selecy SAS)
+//
+// Francis Bouvier <francis@lightpanda.io>
+// Pierre Tachoire <pierre@lightpanda.io>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+const std = @import("std");
+const log = @import("../../log.zig");
+const URL = @import("../../url.zig").URL;
+
+const js = @import("../js/js.zig");
+const Page = @import("../page.zig").Page;
+
+const DirectEventHandler = @import("../events/event.zig").DirectEventHandler;
+const EventTarget = @import("../dom/event_target.zig").EventTarget;
+const EventHandler = @import("../events/event.zig").EventHandler;
+
+const parser = @import("../netsurf.zig");
+
+const Navigation = @import("Navigation.zig");
+const NavigationEventTarget = @import("NavigationEventTarget.zig");
+
+pub const Interfaces = .{
+    Navigation,
+    NavigationEventTarget,
+    NavigationActivation,
+    NavigationTransition,
+    NavigationHistoryEntry,
+};
+
+pub const NavigationType = enum {
+    pub const ENUM_JS_USE_TAG = true;
+
+    push,
+    replace,
+    traverse,
+    reload,
+};
+
+pub const NavigationKind = union(NavigationType) {
+    push: ?[]const u8,
+    replace,
+    traverse: usize,
+    reload,
+};
+
+// https://developer.mozilla.org/en-US/docs/Web/API/NavigationHistoryEntry
+pub const NavigationHistoryEntry = struct {
+    pub const prototype = *EventTarget;
+    base: parser.EventTargetTBase = parser.EventTargetTBase{ .internal_target_type = .plain },
+
+    id: []const u8,
+    key: []const u8,
+    url: ?[]const u8,
+    state: ?[]const u8,
+
+    pub fn get_id(self: *const NavigationHistoryEntry) []const u8 {
+        return self.id;
+    }
+
+    pub fn get_index(self: *const NavigationHistoryEntry, page: *Page) i32 {
+        const navigation = page.session.navigation;
+        for (navigation.entries.items, 0..) |entry, i| {
+            if (std.mem.eql(u8, entry.id, self.id)) {
+                return @intCast(i);
+            }
+        }
+
+        return -1;
+    }
+
+    pub fn get_key(self: *const NavigationHistoryEntry) []const u8 {
+        return self.key;
+    }
+
+    pub fn get_sameDocument(self: *const NavigationHistoryEntry, page: *Page) !bool {
+        const _url = self.url orelse return false;
+        const url = try URL.parse(_url, null);
+        return page.url.eqlDocument(&url, page.call_arena);
+    }
+
+    pub fn get_url(self: *const NavigationHistoryEntry) ?[]const u8 {
+        return self.url;
+    }
+
+    pub fn _getState(self: *const NavigationHistoryEntry, page: *Page) !?js.Value {
+        if (self.state) |state| {
+            return try js.Value.fromJson(page.js, state);
+        } else {
+            return null;
+        }
+    }
+};
+
+// https://developer.mozilla.org/en-US/docs/Web/API/NavigationActivation
+pub const NavigationActivation = struct {
+    const NavigationActivationType = enum {
+        pub const ENUM_JS_USE_TAG = true;
+
+        push,
+        reload,
+        replace,
+        traverse,
+    };
+
+    entry: NavigationHistoryEntry,
+    from: ?NavigationHistoryEntry = null,
+    type: NavigationActivationType,
+
+    pub fn get_entry(self: *const NavigationActivation) NavigationHistoryEntry {
+        return self.entry;
+    }
+
+    pub fn get_from(self: *const NavigationActivation) ?NavigationHistoryEntry {
+        return self.from;
+    }
+
+    pub fn get_navigationType(self: *const NavigationActivation) NavigationActivationType {
+        return self.type;
+    }
+};
+
+// https://developer.mozilla.org/en-US/docs/Web/API/NavigationTransition
+pub const NavigationTransition = struct {
+    finished: js.Promise,
+    from: NavigationHistoryEntry,
+    navigation_type: NavigationActivation.NavigationActivationType,
+};
+
+const Event = @import("../events/event.zig").Event;
+
+pub const NavigationCurrentEntryChangeEvent = struct {
+    pub const prototype = *Event;
+    pub const union_make_copy = true;
+
+    pub const EventInit = struct {
+        from: *NavigationHistoryEntry,
+        navigationType: ?NavigationType = null,
+    };
+
+    proto: parser.Event,
+    from: *NavigationHistoryEntry,
+    navigation_type: ?NavigationType,
+
+    pub fn constructor(event_type: []const u8, opts: EventInit) !NavigationCurrentEntryChangeEvent {
+        const event = try parser.eventCreate();
+        defer parser.eventDestroy(event);
+
+        try parser.eventInit(event, event_type, .{});
+        parser.eventSetInternalType(event, .navigation_current_entry_change_event);
+
+        return .{
+            .proto = event.*,
+            .from = opts.from,
+            .navigation_type = opts.navigationType,
+        };
+    }
+
+    pub fn get_from(self: *NavigationCurrentEntryChangeEvent) *NavigationHistoryEntry {
+        return self.from;
+    }
+
+    pub fn get_navigationType(self: *const NavigationCurrentEntryChangeEvent) ?NavigationType {
+        return self.navigation_type;
+    }
+
+    pub fn dispatch(navigation: *Navigation, from: *NavigationHistoryEntry, typ: ?NavigationType) void {
+        log.debug(.script_event, "dispatch event", .{
+            .type = "currententrychange",
+            .source = "navigation",
+        });
+
+        var evt = NavigationCurrentEntryChangeEvent.constructor(
+            "currententrychange",
+            .{ .from = from, .navigationType = typ },
+        ) catch |err| {
+            log.err(.app, "event constructor error", .{
+                .err = err,
+                .type = "currententrychange",
+                .source = "navigation",
+            });
+
+            return;
+        };
+
+        _ = parser.eventTargetDispatchEvent(
+            @as(*parser.EventTarget, @ptrCast(navigation)),
+            &evt.proto,
+        ) catch |err| {
+            log.err(.app, "dispatch event error", .{
+                .err = err,
+                .type = "currententrychange",
+                .source = "navigation",
+            });
+        };
+    }
+};
+
+pub const NavigateEvent = struct {
+    pub const prototype = *Event;
+    pub const union_make_copy = true;
+
+    pub const EventInit = struct {
+        canIntercept: ?bool = false,
+        // todo: destination
+        downloadRequest: ?[]const u8 = null,
+        // todo: formData
+        hashChange: ?bool = false,
+        hasUAVisualTransition: ?bool = false,
+        // info: ?js.Value,
+        navigationType: ?NavigationType = .push,
+        // todo: signal
+        // todo: sourceElement
+        userInitiated: ?bool = false,
+    };
+
+    proto: parser.Event,
+    can_intercept: bool,
+    download_request: ?[]const u8,
+    // todo: desintation
+    hash_change: bool,
+    has_ua_visual_transition: bool,
+    info: []const u8,
+    navigation_type: NavigationType,
+    // todo: signal
+    // todo: sourceElement
+    user_initiated: bool,
+
+    pub fn constructor(event_type: []const u8, opts: EventInit) !NavigateEvent {
+        const event = try parser.eventCreate();
+        defer parser.eventDestroy(event);
+
+        try parser.eventInit(event, event_type, .{});
+        parser.eventSetInternalType(event, .navigate_event);
+
+        return .{
+            .proto = event.*,
+            .can_intercept = opts.canIntercept orelse false,
+            .download_request = opts.downloadRequest orelse null,
+            .hash_change = opts.hashChange orelse false,
+            .has_ua_visual_transition = opts.hasUAVisualTransition orelse false,
+            .info = undefined,
+            .navigation_type = opts.navigationType orelse .push,
+            // .info = if (opts.info) |info| try info.toString(page.arena) else null,
+            .user_initiated = opts.userInitiated orelse false,
+        };
+    }
+
+    pub const InterceptOptions = struct {
+        // runs after currentEntry is updated
+        handler: ?js.Function,
+        // runs before currentEntry is updated
+        precommitHandler: ?js.Function,
+        focusReset: ?enum { @"after-transition", manual },
+        scroll: ?enum { @"after-transition", manual },
+    };
+
+    // https://developer.mozilla.org/en-US/docs/Web/API/NavigateEvent/intercept
+    pub fn intercept(
+        self: *NavigateEvent,
+        opts: ?InterceptOptions,
+        _: *Page,
+    ) !void {
+        if (!self.can_intercept) {
+            return error.Security;
+        }
+
+        if (self.proto.in_dispatch) {
+            return error.InvalidState;
+        }
+
+        // try parser.eventPreventDefault(&self.proto);
+
+        if (opts) |options| {
+            if (options.precommitHandler) |handler| {
+                _ = try handler.call(void, .{});
+            }
+        }
+
+        // update current entry here.
+
+        if (opts) |options| {
+            if (options.handler) |handler| {
+                const result = try handler.call(js.Value, .{});
+
+                if (result.value.isPromise()) {
+                    // must be stored and resolved based on nav outcome.
+                }
+            }
+
+            // todo: handle focusReset and scroll
+        }
+    }
+
+    pub fn scroll(self: *NavigateEvent) !void {
+        _ = self;
+    }
+
+    pub fn dispatch(navigation: *Navigation, from: *NavigationHistoryEntry, typ: ?NavigationType) void {
+        log.debug(.script_event, "dispatch event", .{
+            .type = "navigate",
+            .source = "navigation",
+        });
+
+        var evt = NavigateEvent.constructor(
+            "navigate",
+            .{ .from = from, .navigationType = typ },
+        ) catch |err| {
+            log.err(.app, "event constructor error", .{
+                .err = err,
+                .type = "navigate",
+                .source = "navigation",
+            });
+
+            return;
+        };
+
+        _ = parser.eventTargetDispatchEvent(
+            @as(*parser.EventTarget, @ptrCast(navigation)),
+            &evt.proto,
+        ) catch |err| {
+            log.err(.app, "dispatch event error", .{
+                .err = err,
+                .type = "navigate",
+                .source = "navigation",
+            });
+        };
+    }
+};
+
+const testing = @import("../../testing.zig");
+test "Browser: Navigation" {
+    try testing.htmlRunner("html/navigation/navigation.html");
+    try testing.htmlRunner("html/navigation/navigation_currententrychange.html");
+}

src/browser/netsurf.zig

@@ -559,6 +559,9 @@ pub const EventType = enum(u8) {
     message_event = 7,
     keyboard_event = 8,
     pop_state = 9,
+    composition_event = 10,
+    navigation_current_entry_change_event = 11,
+    navigate_event = 12,
 };
 
 pub const MutationEvent = c.dom_mutation_event;
@@ -830,6 +833,7 @@ pub const EventTargetTBase = extern struct {
         message_port = 7,
         screen = 8,
         screen_orientation = 9,
+        navigation = 10,
     };
 
     vtable: ?*const c.struct_dom_event_target_vtable = &c.struct_dom_event_target_vtable{

src/browser/page.zig

@@ -35,6 +35,9 @@ const ScriptManager = @import("ScriptManager.zig");
 const SlotChangeMonitor = @import("SlotChangeMonitor.zig");
 const HTMLDocument = @import("html/document.zig").HTMLDocument;
 
+const NavigationKind = @import("navigation/root.zig").NavigationKind;
+const NavigationCurrentEntryChangeEvent = @import("navigation/root.zig").NavigationCurrentEntryChangeEvent;
+
 const js = @import("js/js.zig");
 const URL = @import("../url.zig").URL;
 
@@ -485,16 +488,16 @@ pub const Page = struct {
         }
 
         {
-            std.debug.print("\nprimary schedule: {d}\n", .{self.scheduler.primary.count()});
-            var it = self.scheduler.primary.iterator();
+            std.debug.print("\nhigh_priority schedule: {d}\n", .{self.scheduler.high_priority.count()});
+            var it = self.scheduler.high_priority.iterator();
             while (it.next()) |task| {
                 std.debug.print(" - {s} schedule: {d}ms\n", .{ task.name, task.ms - now });
             }
         }
 
         {
-            std.debug.print("\nsecondary schedule: {d}\n", .{self.scheduler.secondary.count()});
-            var it = self.scheduler.secondary.iterator();
+            std.debug.print("\nlow_priority schedule: {d}\n", .{self.scheduler.low_priority.count()});
+            var it = self.scheduler.low_priority.iterator();
             while (it.next()) |task| {
                 std.debug.print(" - {s} schedule: {d}ms\n", .{ task.name, task.ms - now });
             }
@@ -549,14 +552,31 @@ pub const Page = struct {
             .body = opts.body != null,
         });
 
-        // if the url is about:blank, nothing to do.
+        // if the url is about:blank, we load an empty HTML document in the
+        // page and dispatch the events.
         if (std.mem.eql(u8, "about:blank", request_url)) {
             const html_doc = try parser.documentHTMLParseFromStr("");
             try self.setDocument(html_doc);
 
+            // Assume we parsed the document.
+            // It's important to force a reset during the following navigation.
+            self.mode = .parsed;
+
             // We do not processHTMLDoc here as we know we don't have any scripts
             // This assumption may be false when CDP Page.addScriptToEvaluateOnNewDocument is implemented
-            try HTMLDocument.documentIsComplete(self.window.document, self);
+            self.documentIsComplete();
+
+            self.session.browser.notification.dispatch(.page_navigate, &.{
+                .opts = opts,
+                .url = request_url,
+                .timestamp = timestamp(),
+            });
+
+            self.session.browser.notification.dispatch(.page_navigated, &.{
+                .url = request_url,
+                .timestamp = timestamp(),
+            });
+
             return;
         }
 
@@ -815,8 +835,8 @@ pub const Page = struct {
             },
         }
 
-        // Push the navigation after a successful load.
-        try self.session.history.pushNavigation(self.url.raw, self);
+        // We need to handle different navigation types differently.
+        try self.session.navigation.processNavigation(self);
     }
 
     fn pageErrorCallback(ctx: *anyopaque, err: anyerror) void {
@@ -859,7 +879,7 @@ pub const Page = struct {
         self.window.setStorageShelf(
             try self.session.storage_shed.getOrPut(try self.origin(self.arena)),
         );
-        try self.window.replaceLocation(.{ .url = try self.url.toWebApi(self.arena) });
+        try self.window.changeLocation(self.url.raw, self);
     }
 
     pub const MouseEvent = struct {
@@ -906,7 +926,7 @@ pub const Page = struct {
             .a => {
                 const element: *parser.Element = @ptrCast(node);
                 const href = (try parser.elementGetAttribute(element, "href")) orelse return;
-                try self.navigateFromWebAPI(href, .{});
+                try self.navigateFromWebAPI(href, .{}, .{ .push = null });
             },
             .input => {
                 const element: *parser.Element = @ptrCast(node);
@@ -1013,13 +1033,62 @@ pub const Page = struct {
         }
     }
 
+    // insertText is a shortcut to insert text into the active element.
+    pub fn insertText(self: *Page, v: []const u8) !void {
+        const Document = @import("dom/document.zig").Document;
+        const element = (try Document.getActiveElement(@ptrCast(self.window.document), self)) orelse return;
+        const node = parser.elementToNode(element);
+
+        const tag = (try parser.nodeHTMLGetTagType(node)) orelse return;
+        switch (tag) {
+            .input => {
+                const input_type = try parser.inputGetType(@ptrCast(element));
+                if (std.mem.eql(u8, input_type, "text")) {
+                    const value = try parser.inputGetValue(@ptrCast(element));
+                    const new_value = try std.mem.concat(self.arena, u8, &.{ value, v });
+                    try parser.inputSetValue(@ptrCast(element), new_value);
+                }
+            },
+            .textarea => {
+                const value = try parser.textareaGetValue(@ptrCast(node));
+                const new_value = try std.mem.concat(self.arena, u8, &.{ value, v });
+                try parser.textareaSetValue(@ptrCast(node), new_value);
+            },
+            else => {},
+        }
+    }
+
     // We cannot navigate immediately as navigating will delete the DOM tree,
     // which holds this event's node.
     // As such we schedule the function to be called as soon as possible.
     // The page.arena is safe to use here, but the transfer_arena exists
     // specifically for this type of lifetime.
-    pub fn navigateFromWebAPI(self: *Page, url: []const u8, opts: NavigateOpts) !void {
+    pub fn navigateFromWebAPI(self: *Page, url: []const u8, opts: NavigateOpts, kind: NavigationKind) !void {
         const session = self.session;
+        const stitched_url = try URL.stitch(
+            session.transfer_arena,
+            url,
+            self.url.raw,
+            .{
+                .alloc = .always,
+                .null_terminated = true,
+            },
+        );
+
+        // Force will force a page load.
+        // Otherwise, we need to check if this is a true navigation.
+        if (!opts.force) {
+            // If we are navigating within the same document, just change URL.
+            const new_url = try URL.parse(stitched_url, null);
+
+            if (try self.url.eqlDocument(&new_url, session.transfer_arena)) {
+                self.url = new_url;
+                try self.window.changeLocation(self.url.raw, self);
+                try session.navigation.updateEntries(stitched_url, kind, self, true);
+                return;
+            }
+        }
+
         if (session.queued_navigation != null) {
             // It might seem like this should never happen. And it might not,
             // BUT..consider the case where we have script like:
@@ -1042,9 +1111,11 @@ pub const Page = struct {
 
         session.queued_navigation = .{
             .opts = opts,
-            .url = try URL.stitch(session.transfer_arena, url, self.url.raw, .{ .alloc = .always }),
+            .url = stitched_url,
         };
 
+        session.navigation_kind = kind;
+
         self.http_client.abort();
 
         // In v8, this throws an exception which JS code cannot catch.
@@ -1095,7 +1166,7 @@ pub const Page = struct {
         } else {
             action = try URL.concatQueryString(transfer_arena, action, buf.items);
         }
-        try self.navigateFromWebAPI(action, opts);
+        try self.navigateFromWebAPI(action, opts, .{ .push = null });
     }
 
     pub fn isNodeAttached(self: *const Page, node: *parser.Node) bool {
@@ -1153,6 +1224,7 @@ pub const NavigateReason = enum {
     form,
     script,
     history,
+    navigation,
 };
 
 pub const NavigateOpts = struct {
@@ -1161,6 +1233,7 @@ pub const NavigateOpts = struct {
     method: Http.Method = .GET,
     body: ?[]const u8 = null,
     header: ?[:0]const u8 = null,
+    force: bool = false,
 };
 
 const IdleNotification = union(enum) {

src/browser/renderer.zig

@@ -41,6 +41,10 @@ const FlatRenderer = struct {
 
     const Element = @import("dom/element.zig").Element;
 
+    // Define the size of each element in the grid.
+    const default_w = 5;
+    const default_h = 5;
+
     // we expect allocator to be an arena
     pub fn init(allocator: Allocator) FlatRenderer {
         return .{
@@ -62,10 +66,10 @@ const FlatRenderer = struct {
             gop.value_ptr.* = x;
         }
 
-        const _x: f64 = @floatFromInt(x);
+        const _x: f64 = @floatFromInt(x * default_w);
         const y: f64 = 0.0;
-        const w: f64 = 1.0;
-        const h: f64 = 1.0;
+        const w: f64 = default_w;
+        const h: f64 = default_h;
 
         return .{
             .x = _x,
@@ -98,18 +102,20 @@ const FlatRenderer = struct {
     }
 
     pub fn width(self: *const FlatRenderer) u32 {
-        return @max(@as(u32, @intCast(self.elements.items.len)), 1); // At least 1 pixel even if empty
+        return @max(@as(u32, @intCast(self.elements.items.len * default_w)), default_w); // At least default width pixels even if empty
     }
 
     pub fn height(_: *const FlatRenderer) u32 {
-        return 1;
+        return 5;
     }
 
-    pub fn getElementAtPosition(self: *const FlatRenderer, x: i32, y: i32) ?*parser.Element {
-        if (y != 0 or x < 0) {
+    pub fn getElementAtPosition(self: *const FlatRenderer, _x: i32, y: i32) ?*parser.Element {
+        if (y < 0 or y > default_h or _x < 0) {
             return null;
         }
 
+        const x = @divFloor(_x, default_w);
+
         const elements = self.elements.items;
         return if (x < elements.len) @ptrFromInt(elements[@intCast(x)]) else null;
     }

src/browser/session.zig

@@ -22,9 +22,11 @@ const Allocator = std.mem.Allocator;
 
 const js = @import("js/js.zig");
 const Page = @import("page.zig").Page;
+const NavigationKind = @import("navigation/root.zig").NavigationKind;
 const Browser = @import("browser.zig").Browser;
 const NavigateOpts = @import("page.zig").NavigateOpts;
 const History = @import("html/History.zig");
+const Navigation = @import("navigation/Navigation.zig");
 
 const log = @import("../log.zig");
 const parser = @import("netsurf.zig");
@@ -57,6 +59,8 @@ pub const Session = struct {
     // History is persistent across the "tab".
     // https://developer.mozilla.org/en-US/docs/Web/API/History
     history: History = .{},
+    navigation: Navigation = .{},
+    navigation_kind: ?NavigationKind = null,
 
     page: ?Page = null,
 
@@ -100,6 +104,9 @@ pub const Session = struct {
         // We need to init this early as JS event handlers may be registered through Runtime.evaluate before the first html doc is loaded
         parser.init();
 
+        // creates a new event target for Navigation
+        self.navigation.resetForNewPage();
+
         const page_arena = &self.browser.page_arena;
         _ = page_arena.reset(.{ .retain_with_limit = 1 * 1024 * 1024 });
         _ = self.browser.state_pool.reset(.{ .retain_with_limit = 4 * 1024 });

src/browser/url/url.zig

@@ -18,6 +18,8 @@
 
 const std = @import("std");
 const Allocator = std.mem.Allocator;
+const Writer = std.Io.Writer;
+const ada = @import("ada");
 
 const js = @import("../js/js.zig");
 const parser = @import("../netsurf.zig");
@@ -35,182 +37,235 @@ pub const Interfaces = .{
     EntryIterable,
 };
 
-// https://url.spec.whatwg.org/#url
-//
-// TODO we could avoid many of these getter string allocatoration in two differents
-// way:
-//
-// 1. We can eventually get the slice of scheme *with* the following char in
-// the underlying string. But I don't know if it's possible and how to do that.
-// I mean, if the rawuri contains `https://foo.bar`, uri.scheme is a slice
-// containing only `https`. I want `https:` so, in theory, I don't need to
-// allocatorate data, I should be able to retrieve the scheme + the following `:`
-// from rawuri.
-//
-// 2. The other way would be to copy the `std.Uri` code to have a dedicated
-// parser including the characters we want for the web API.
+/// https://developer.mozilla.org/en-US/docs/Web/API/URL/URL
 pub const URL = struct {
-    uri: std.Uri,
+    internal: ada.URL,
+    /// We prefer in-house search params solution here;
+    /// ada's search params impl use more memory.
+    /// It also offers it's own iterator implementation
+    /// where we'd like to use ours.
     search_params: URLSearchParams,
 
     pub const empty = URL{
-        .uri = .{ .scheme = "" },
+        .internal = null,
         .search_params = .{},
     };
 
-    const URLArg = union(enum) {
-        url: *URL,
-        element: *parser.ElementHTML,
+    // You can use an existing URL object for either argument, and it will be
+    // stringified from the object's href property.
+    const ConstructorArg = union(enum) {
         string: []const u8,
+        url: *const URL,
+        element: *parser.Element,
 
-        fn toString(self: URLArg, arena: Allocator) !?[]const u8 {
-            switch (self) {
-                .string => |s| return s,
-                .url => |url| return try url.toString(arena),
-                .element => |e| return try parser.elementGetAttribute(@ptrCast(e), "href"),
-            }
+        fn toString(self: ConstructorArg, page: *Page) ![]const u8 {
+            return switch (self) {
+                .string => |s| s,
+                .url => |url| url._toString(page),
+                .element => |e| {
+                    const attrib = try parser.elementGetAttribute(@ptrCast(e), "href") orelse {
+                        return error.InvalidArgument;
+                    };
+
+                    return attrib;
+                },
+            };
         }
     };
 
-    pub fn constructor(url: URLArg, base: ?URLArg, page: *Page) !URL {
-        const arena = page.arena;
-        const url_str = try url.toString(arena) orelse return error.InvalidArgument;
+    pub fn constructor(url: ConstructorArg, maybe_base: ?ConstructorArg, page: *Page) !URL {
+        const url_str = try url.toString(page);
 
-        var raw: ?[]const u8 = null;
-        if (base) |b| {
-            if (try b.toString(arena)) |bb| {
-                raw = try @import("../../url.zig").URL.stitch(arena, url_str, bb, .{});
-            }
+        const internal = try blk: {
+            if (maybe_base) |base| {
+                break :blk ada.parseWithBase(url_str, try base.toString(page));
             }
 
-        if (raw == null) {
-            // if it was a URL, then it's already be owned by the arena
-            raw = if (url == .url) url_str else try arena.dupe(u8, url_str);
-        }
-
-        const uri = std.Uri.parse(raw.?) catch blk: {
-            if (!std.mem.endsWith(u8, raw.?, "://")) {
-                return error.TypeError;
-            }
-            // schema only is valid!
-            break :blk std.Uri{
-                .scheme = raw.?[0 .. raw.?.len - 3],
-                .host = .{ .percent_encoded = "" },
-            };
+            break :blk ada.parse(url_str);
         };
 
-        return init(arena, uri);
-    }
-
-    pub fn init(arena: Allocator, uri: std.Uri) !URL {
         return .{
-            .uri = uri,
-            .search_params = try URLSearchParams.init(
-                arena,
-                uriComponentNullStr(uri.query),
-            ),
+            .internal = internal,
+            .search_params = try prepareSearchParams(page.arena, internal),
         };
     }
 
-    pub fn initWithoutSearchParams(uri: std.Uri) URL {
-        return .{ .uri = uri, .search_params = .{} };
+    pub fn destructor(self: *const URL) void {
+        // Not tracked by arena.
+        return ada.free(self.internal);
     }
 
-    pub fn get_origin(self: *URL, page: *Page) ![]const u8 {
-        var aw = std.Io.Writer.Allocating.init(page.arena);
-        try self.uri.writeToStream(&aw.writer, .{
-            .scheme = true,
-            .authentication = false,
-            .authority = true,
-            .path = false,
-            .query = false,
-            .fragment = false,
-        });
-        return aw.written();
+    /// Only to be used by `Location` API. `url` MUST NOT provide search params.
+    pub fn initForLocation(url: []const u8) !URL {
+        return .{ .internal = try ada.parse(url), .search_params = .{} };
     }
 
-    // get_href returns the URL by writing all its components.
-    pub fn get_href(self: *URL, page: *Page) ![]const u8 {
-        return self.toString(page.arena);
+    /// Reinitializes the URL by parsing given `url`. Search params can be provided.
+    pub fn reinit(self: *URL, url: []const u8, page: *Page) !void {
+        _ = ada.setHref(self.internal, url);
+        if (!ada.isValid(self.internal)) return error.Internal;
+
+        self.search_params = try prepareSearchParams(page.arena, self.internal);
     }
 
-    pub fn _toString(self: *URL, page: *Page) ![]const u8 {
-        return self.toString(page.arena);
+    /// Prepares a `URLSearchParams` from given `internal`.
+    /// Resets `search` of `internal`.
+    fn prepareSearchParams(arena: Allocator, internal: ada.URL) !URLSearchParams {
+        const maybe_search = ada.getSearchNullable(internal);
+        // Empty.
+        if (maybe_search.data == null) return .{};
+
+        const search = maybe_search.data[0..maybe_search.length];
+        const search_params = URLSearchParams.initFromString(arena, search);
+        // After a call to this function, search params are tracked by
+        // `search_params`. So we reset the internal's search.
+        ada.clearSearch(internal);
+
+        return search_params;
     }
 
-    // format the url with all its components.
-    pub fn toString(self: *const URL, arena: Allocator) ![]const u8 {
-        var aw = std.Io.Writer.Allocating.init(arena);
-        try self.uri.writeToStream(&aw.writer, .{
-            .scheme = true,
-            .authentication = true,
-            .authority = true,
-            .path = uriComponentNullStr(self.uri.path).len > 0,
-        });
+    pub fn clearPort(self: *const URL) void {
+        return ada.clearPort(self.internal);
+    }
 
+    pub fn clearHash(self: *const URL) void {
+        return ada.clearHash(self.internal);
+    }
+
+    /// Returns a boolean indicating whether or not an absolute URL,
+    /// or a relative URL combined with a base URL, are parsable and valid.
+    pub fn static_canParse(url: ConstructorArg, maybe_base: ?ConstructorArg, page: *Page) !bool {
+        const url_str = try url.toString(page);
+
+        if (maybe_base) |base| {
+            return ada.canParseWithBase(url_str, try base.toString(page));
+        }
+
+        return ada.canParse(url_str);
+    }
+
+    /// Alias to get_href.
+    pub fn _toString(self: *const URL, page: *Page) ![]const u8 {
+        return self.get_href(page);
+    }
+
+    // Getters.
+
+    pub fn get_searchParams(self: *URL) *URLSearchParams {
+        return &self.search_params;
+    }
+
+    pub fn get_origin(self: *const URL, page: *Page) ![]const u8 {
+        // `ada.getOriginNullable` allocates memory in order to find the `origin`.
+        // We'd like to use our arena allocator for such case;
+        // so here we allocate the `origin` in page arena and free the original.
+        const maybe_origin = ada.getOriginNullable(self.internal);
+        if (maybe_origin.data == null) {
+            return "";
+        }
+        defer ada.freeOwnedString(maybe_origin);
+
+        const origin = maybe_origin.data[0..maybe_origin.length];
+        return page.call_arena.dupe(u8, origin);
+    }
+
+    pub fn get_href(self: *const URL, page: *Page) ![]const u8 {
+        var w: Writer.Allocating = .init(page.arena);
+
+        // If URL is not valid, return immediately.
+        if (!ada.isValid(self.internal)) {
+            return "";
+        }
+
+        // Since the earlier check passed, this can't be null.
+        const str = ada.getHrefNullable(self.internal);
+        const href = str.data[0..str.length];
+        // This can't be null either.
+        const comps = ada.getComponents(self.internal);
+        // If hash provided, we write it after we fit-in the search params.
+        const has_hash = comps.hash_start != ada.URLOmitted;
+        const href_part = if (has_hash) href[0..comps.hash_start] else href;
+        try w.writer.writeAll(href_part);
+
+        // Write search params if provided.
         if (self.search_params.get_size() > 0) {
-            try aw.writer.writeByte('?');
-            try self.search_params.write(&aw.writer);
+            try w.writer.writeByte('?');
+            try self.search_params.write(&w.writer);
         }
 
-        {
-            const fragment = uriComponentNullStr(self.uri.fragment);
-            if (fragment.len > 0) {
-                try aw.writer.writeByte('#');
-                try aw.writer.writeAll(fragment);
-            }
+        // Write hash if provided before.
+        const hash = self.get_hash();
+        try w.writer.writeAll(hash);
+
+        return w.written();
     }
 
-        return aw.written();
+    pub fn get_username(self: *const URL) []const u8 {
+        const username = ada.getUsernameNullable(self.internal);
+        if (username.data == null) {
+            return "";
         }
 
-    pub fn get_protocol(self: *const URL) []const u8 {
-        // std.Uri keeps a pointer to "https", "http" (scheme part) so we know
-        // its followed by ':'.
-        const scheme = self.uri.scheme;
-        return scheme.ptr[0 .. scheme.len + 1];
+        return username.data[0..username.length];
     }
 
-    pub fn get_username(self: *URL) []const u8 {
-        return uriComponentNullStr(self.uri.user);
+    pub fn get_password(self: *const URL) []const u8 {
+        const password = ada.getPasswordNullable(self.internal);
+        if (password.data == null) {
+            return "";
         }
 
-    pub fn get_password(self: *URL) []const u8 {
-        return uriComponentNullStr(self.uri.password);
+        return password.data[0..password.length];
     }
 
-    pub fn get_host(self: *URL, page: *Page) ![]const u8 {
-        var aw = std.Io.Writer.Allocating.init(page.arena);
-        try self.uri.writeToStream(&aw.writer, .{
-            .scheme = false,
-            .authentication = false,
-            .authority = true,
-            .path = false,
-            .query = false,
-            .fragment = false,
-        });
-        return aw.written();
+    pub fn get_port(self: *const URL) []const u8 {
+        const port = ada.getPortNullable(self.internal);
+        if (port.data == null) {
+            return "";
         }
 
-    pub fn get_hostname(self: *URL) []const u8 {
-        return uriComponentNullStr(self.uri.host);
+        return port.data[0..port.length];
     }
 
-    pub fn get_port(self: *URL, page: *Page) ![]const u8 {
-        const arena = page.arena;
-        if (self.uri.port == null) return try arena.dupe(u8, "");
-
-        var aw = std.Io.Writer.Allocating.init(arena);
-        try aw.writer.printInt(self.uri.port.?, 10, .lower, .{});
-        return aw.written();
+    pub fn get_hash(self: *const URL) []const u8 {
+        const hash = ada.getHashNullable(self.internal);
+        if (hash.data == null) {
+            return "";
         }
 
-    pub fn get_pathname(self: *URL) []const u8 {
-        if (uriComponentStr(self.uri.path).len == 0) return "/";
-        return uriComponentStr(self.uri.path);
+        return hash.data[0..hash.length];
     }
 
-    pub fn get_search(self: *URL, page: *Page) ![]const u8 {
+    pub fn get_host(self: *const URL) []const u8 {
+        const host = ada.getHostNullable(self.internal);
+        if (host.data == null) {
+            return "";
+        }
+
+        return host.data[0..host.length];
+    }
+
+    pub fn get_hostname(self: *const URL) []const u8 {
+        const hostname = ada.getHostnameNullable(self.internal);
+        if (hostname.data == null) {
+            return "";
+        }
+
+        return hostname.data[0..hostname.length];
+    }
+
+    pub fn get_pathname(self: *const URL) []const u8 {
+        const path = ada.getPathnameNullable(self.internal);
+        // Return a slash if path is null.
+        if (path.data == null) {
+            return "/";
+        }
+
+        return path.data[0..path.length];
+    }
+
+    /// get_search depends on the current state of `search_params`.
+    pub fn get_search(self: *const URL, page: *Page) ![]const u8 {
         const arena = page.arena;
 
         if (self.search_params.get_size() == 0) {
@@ -223,72 +278,104 @@ pub const URL = struct {
         return buf.items;
     }
 
-    pub fn set_search(self: *URL, qs_: ?[]const u8, page: *Page) !void {
+    pub fn get_protocol(self: *const URL) []const u8 {
+        const protocol = ada.getProtocolNullable(self.internal);
+        if (protocol.data == null) {
+            return "";
+        }
+
+        return protocol.data[0..protocol.length];
+    }
+
+    // Setters.
+
+    /// Ada-url don't define any errors, so we just prefer one unified
+    /// `Internal` error for failing cases.
+    const SetterError = error{Internal};
+
+    pub fn set_href(self: *URL, input: []const u8, page: *Page) !void {
+        _ = ada.setHref(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+        // Can't call `get_search` here since it uses `search_params`.
+        self.search_params = try prepareSearchParams(page.arena, self.internal);
+    }
+
+    pub fn set_host(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setHost(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_hostname(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setHostname(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_protocol(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setProtocol(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_username(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setUsername(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_password(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setPassword(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_port(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setPort(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_pathname(self: *const URL, input: []const u8) SetterError!void {
+        _ = ada.setPathname(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
+    }
+
+    pub fn set_search(self: *URL, maybe_input: ?[]const u8, page: *Page) !void {
         self.search_params = .{};
-        if (qs_) |qs| {
-            self.search_params = try URLSearchParams.init(page.arena, qs);
+        if (maybe_input) |input| {
+            self.search_params = try .initFromString(page.arena, input);
         }
     }
 
-    pub fn get_hash(self: *URL, page: *Page) ![]const u8 {
-        const arena = page.arena;
-        if (self.uri.fragment == null) return try arena.dupe(u8, "");
-
-        return try std.mem.concat(arena, u8, &[_][]const u8{ "#", uriComponentNullStr(self.uri.fragment) });
-    }
-
-    pub fn get_searchParams(self: *URL) *URLSearchParams {
-        return &self.search_params;
-    }
-
-    pub fn _toJSON(self: *URL, page: *Page) ![]const u8 {
-        return self.get_href(page);
+    pub fn set_hash(self: *const URL, input: []const u8) !void {
+        ada.setHash(self.internal, input);
+        if (!ada.isValid(self.internal)) return error.Internal;
     }
 };
 
-// uriComponentNullStr converts an optional std.Uri.Component to string value.
-// The string value can be undecoded.
-fn uriComponentNullStr(c: ?std.Uri.Component) []const u8 {
-    if (c == null) return "";
-
-    return uriComponentStr(c.?);
-}
-
-fn uriComponentStr(c: std.Uri.Component) []const u8 {
-    return switch (c) {
-        .raw => |v| v,
-        .percent_encoded => |v| v,
-    };
-}
-
-// https://url.spec.whatwg.org/#interface-urlsearchparams
 pub const URLSearchParams = struct {
     entries: kv.List = .{},
 
-    const URLSearchParamsOpts = union(enum) {
-        qs: []const u8,
+    pub const ConstructorOptions = union(enum) {
+        query_string: []const u8,
         form_data: *const FormData,
-        js_obj: js.Object,
+        object: js.Object,
     };
-    pub fn constructor(opts_: ?URLSearchParamsOpts, page: *Page) !URLSearchParams {
-        const opts = opts_ orelse return .{ .entries = .{} };
-        return switch (opts) {
-            .qs => |qs| init(page.arena, qs),
-            .form_data => |fd| .{ .entries = try fd.entries.clone(page.arena) },
-            .js_obj => |js_obj| {
-                const arena = page.arena;
-                var it = js_obj.nameIterator();
 
-                var entries: kv.List = .{};
+    pub fn constructor(maybe_options: ?ConstructorOptions, page: *Page) !URLSearchParams {
+        const options = maybe_options orelse return .{};
+
+        const arena = page.arena;
+        return switch (options) {
+            .query_string => |string| .{ .entries = try parseQuery(arena, string) },
+            .form_data => |form_data| .{ .entries = try form_data.entries.clone(arena) },
+            .object => |object| {
+                var it = object.nameIterator();
+
+                var entries = kv.List{};
                 try entries.ensureTotalCapacity(arena, it.count);
 
                 while (try it.next()) |js_name| {
                     const name = try js_name.toString(arena);
-                    const js_val = try js_obj.get(name);
-                    entries.appendOwnedAssumeCapacity(
-                        name,
-                        try js_val.toString(arena),
-                    );
+                    const js_value = try object.get(name);
+                    const value = try js_value.toString(arena);
+
+                    entries.appendOwnedAssumeCapacity(name, value);
                 }
 
                 return .{ .entries = entries };
@@ -296,10 +383,9 @@ pub const URLSearchParams = struct {
         };
     }
 
-    pub fn init(arena: Allocator, qs_: ?[]const u8) !URLSearchParams {
-        return .{
-            .entries = if (qs_) |qs| try parseQuery(arena, qs) else .{},
-        };
+    /// Initializes URLSearchParams from a query string.
+    pub fn initFromString(arena: Allocator, query_string: []const u8) !URLSearchParams {
+        return .{ .entries = try parseQuery(arena, query_string) };
     }
 
     pub fn get_size(self: *const URLSearchParams) u32 {

src/cdp/cdp.zig

@@ -632,6 +632,17 @@ pub fn BrowserContext(comptime CDP_T: type) type {
             };
         }
 
+        // debugger events
+        pub fn onRunMessageLoopOnPause(_: *anyopaque, _: u32) void {
+            // onRunMessageLoopOnPause is called when a breakpoint is hit.
+            // Until quit pause, we must continue to run a nested message loop
+            // to interact with the the debugger ony (ie. Chrome DevTools).
+        }
+
+        pub fn onQuitMessageLoopOnPause(_: *anyopaque) void {
+            // Quit breakpoint pause.
+        }
+
         // This is hacky x 2. First, we create the JSON payload by gluing our
         // session_id onto it. Second, we're much more client/websocket aware than
         // we should be.
@@ -702,7 +713,7 @@ const IsolatedWorld = struct {
     // The isolate world must share at least some of the state with the related page, specifically the DocumentHTML
     // (assuming grantUniveralAccess will be set to True!).
     // We just created the world and the page. The page's state lives in the session, but is update on navigation.
-    // This also means this pointer becomes invalid after removePage untill a new page is created.
+    // This also means this pointer becomes invalid after removePage until a new page is created.
     // Currently we have only 1 page/frame and thus also only 1 state in the isolate world.
     pub fn createContext(self: *IsolatedWorld, page: *Page) !void {
         // if (self.executor.context != null) return error.Only1IsolatedContextSupported;

src/cdp/domains/browser.zig

@@ -38,16 +38,22 @@ const DEV_TOOLS_WINDOW_ID = 1923710101;
 pub fn processMessage(cmd: anytype) !void {
     const action = std.meta.stringToEnum(enum {
         getVersion,
-        setDownloadBehavior,
-        getWindowForTarget,
+        setPermission,
         setWindowBounds,
+        resetPermissions,
+        grantPermissions,
+        getWindowForTarget,
+        setDownloadBehavior,
     }, cmd.input.action) orelse return error.UnknownMethod;
 
     switch (action) {
         .getVersion => return getVersion(cmd),
-        .setDownloadBehavior => return setDownloadBehavior(cmd),
-        .getWindowForTarget => return getWindowForTarget(cmd),
+        .setPermission => return setPermission(cmd),
         .setWindowBounds => return setWindowBounds(cmd),
+        .resetPermissions => return resetPermissions(cmd),
+        .grantPermissions => return grantPermissions(cmd),
+        .getWindowForTarget => return getWindowForTarget(cmd),
+        .setDownloadBehavior => return setDownloadBehavior(cmd),
     }
 }
 
@@ -89,6 +95,21 @@ fn setWindowBounds(cmd: anytype) !void {
     return cmd.sendResult(null, .{});
 }
 
+// TODO: noop method
+fn grantPermissions(cmd: anytype) !void {
+    return cmd.sendResult(null, .{});
+}
+
+// TODO: noop method
+fn setPermission(cmd: anytype) !void {
+    return cmd.sendResult(null, .{});
+}
+
+// TODO: noop method
+fn resetPermissions(cmd: anytype) !void {
+    return cmd.sendResult(null, .{});
+}
+
 const testing = @import("../testing.zig");
 test "cdp.browser: getVersion" {
     var ctx = testing.context();

src/cdp/domains/dom.zig

@@ -663,11 +663,11 @@ test "cdp.dom: getBoxModel" {
         .params = .{ .nodeId = 6 },
     });
     try ctx.expectSentResult(.{ .model = BoxModel{
-        .content = Quad{ 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0 },
-        .padding = Quad{ 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0 },
-        .border = Quad{ 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0 },
-        .margin = Quad{ 0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0 },
-        .width = 1,
-        .height = 1,
+        .content = Quad{ 0.0, 0.0, 5.0, 0.0, 5.0, 5.0, 0.0, 5.0 },
+        .padding = Quad{ 0.0, 0.0, 5.0, 0.0, 5.0, 5.0, 0.0, 5.0 },
+        .border = Quad{ 0.0, 0.0, 5.0, 0.0, 5.0, 5.0, 0.0, 5.0 },
+        .margin = Quad{ 0.0, 0.0, 5.0, 0.0, 5.0, 5.0, 0.0, 5.0 },
+        .width = 5,
+        .height = 5,
     } }, .{ .id = 5 });
 }

src/cdp/domains/input.zig

@@ -23,11 +23,13 @@ pub fn processMessage(cmd: anytype) !void {
     const action = std.meta.stringToEnum(enum {
         dispatchKeyEvent,
         dispatchMouseEvent,
+        insertText,
     }, cmd.input.action) orelse return error.UnknownMethod;
 
     switch (action) {
         .dispatchKeyEvent => return dispatchKeyEvent(cmd),
         .dispatchMouseEvent => return dispatchMouseEvent(cmd),
+        .insertText => return insertText(cmd),
     }
 }
 
@@ -115,6 +117,20 @@ fn dispatchMouseEvent(cmd: anytype) !void {
     // result already sent
 }
 
+// https://chromedevtools.github.io/devtools-protocol/tot/Input/#method-insertText
+fn insertText(cmd: anytype) !void {
+    const params = (try cmd.params(struct {
+        text: []const u8, // The text to insert
+    })) orelse return error.InvalidParams;
+
+    const bc = cmd.browser_context orelse return;
+    const page = bc.session.currentPage() orelse return;
+
+    try page.insertText(params.text);
+
+    try cmd.sendResult(null, .{});
+}
+
 fn clickNavigate(cmd: anytype, uri: std.Uri) !void {
     const bc = cmd.browser_context.?;
 

src/cdp/domains/page.zig

@@ -18,6 +18,7 @@
 
 const std = @import("std");
 const Page = @import("../../browser/page.zig").Page;
+const timestampF = @import("../../datetime.zig").timestamp;
 const Notification = @import("../../notification.zig").Notification;
 
 const Allocator = std.mem.Allocator;
@@ -82,11 +83,33 @@ fn setLifecycleEventsEnabled(cmd: anytype) !void {
     })) orelse return error.InvalidParams;
 
     const bc = cmd.browser_context orelse return error.BrowserContextNotLoaded;
-    if (params.enabled) {
-        try bc.lifecycleEventsEnable();
-    } else {
+
+    if (params.enabled == false) {
         bc.lifecycleEventsDisable();
+        return cmd.sendResult(null, .{});
     }
+
+    // Enable lifecycle events.
+    try bc.lifecycleEventsEnable();
+
+    // When we enable lifecycle events, we must dispatch events for all
+    // attached targets.
+    const page = bc.session.currentPage() orelse return error.PageNotLoaded;
+
+    if (page.load_state == .complete) {
+        try sendPageLifecycle(bc, "DOMContentLoaded", timestampF());
+        try sendPageLifecycle(bc, "load", timestampF());
+
+        const http_active = page.http_client.active;
+        const total_network_activity = http_active + page.http_client.intercepted;
+        if (page.notified_network_almost_idle.check(total_network_activity <= 2)) {
+            try sendPageLifecycle(bc, "networkAlmostIdle", timestampF());
+        }
+        if (page.notified_network_idle.check(total_network_activity == 0)) {
+            try sendPageLifecycle(bc, "networkIdle", timestampF());
+        }
+    }
+
     return cmd.sendResult(null, .{});
 }
 
@@ -174,7 +197,7 @@ pub fn pageNavigate(arena: Allocator, bc: anytype, event: *const Notification.Pa
     var cdp = bc.cdp;
     const reason_: ?[]const u8 = switch (event.opts.reason) {
         .anchor => "anchorClick",
-        .script, .history => "scriptInitiated",
+        .script, .history, .navigation => "scriptInitiated",
         .form => switch (event.opts.method) {
             .GET => "formSubmissionGet",
             .POST => "formSubmissionPost",

src/cdp/domains/security.zig

@@ -21,9 +21,48 @@ const std = @import("std");
 pub fn processMessage(cmd: anytype) !void {
     const action = std.meta.stringToEnum(enum {
         enable,
+        setIgnoreCertificateErrors,
     }, cmd.input.action) orelse return error.UnknownMethod;
 
     switch (action) {
         .enable => return cmd.sendResult(null, .{}),
+        .setIgnoreCertificateErrors => return setIgnoreCertificateErrors(cmd),
     }
 }
+
+fn setIgnoreCertificateErrors(cmd: anytype) !void {
+    const params = (try cmd.params(struct {
+        ignore: bool,
+    })) orelse return error.InvalidParams;
+
+    if (params.ignore) {
+        try cmd.cdp.browser.http_client.disableTlsVerify();
+    } else {
+        try cmd.cdp.browser.http_client.enableTlsVerify();
+    }
+
+    return cmd.sendResult(null, .{});
+}
+
+const testing = @import("../testing.zig");
+
+test "cdp.Security: setIgnoreCertificateErrors" {
+    var ctx = testing.context();
+    defer ctx.deinit();
+
+    _ = try ctx.loadBrowserContext(.{ .id = "BID-9" });
+
+    try ctx.processMessage(.{
+        .id = 8,
+        .method = "Security.setIgnoreCertificateErrors",
+        .params = .{ .ignore = true },
+    });
+    try ctx.expectSentResult(null, .{ .id = 8 });
+
+    try ctx.processMessage(.{
+        .id = 9,
+        .method = "Security.setIgnoreCertificateErrors",
+        .params = .{ .ignore = false },
+    });
+    try ctx.expectSentResult(null, .{ .id = 9 });
+}

src/cdp/domains/target.zig

@@ -109,7 +109,7 @@ fn disposeBrowserContext(cmd: anytype) !void {
 
 fn createTarget(cmd: anytype) !void {
     const params = (try cmd.params(struct {
-        // url: []const u8,
+        url: []const u8 = "about:blank",
         // width: ?u64 = null,
         // height: ?u64 = null,
         browserContextId: ?[]const u8 = null,
@@ -167,7 +167,7 @@ fn createTarget(cmd: anytype) !void {
         .targetInfo = TargetInfo{
             .attached = false,
             .targetId = target_id,
-            .title = "about:blank",
+            .title = params.url,
             .browserContextId = bc.id,
             .url = "about:blank",
         },
@@ -178,6 +178,10 @@ fn createTarget(cmd: anytype) !void {
         try doAttachtoTarget(cmd, target_id);
     }
 
+    try page.navigate(params.url, .{
+        .reason = .address_bar,
+    });
+
     try cmd.sendResult(.{
         .targetId = target_id,
     }, .{});
@@ -517,7 +521,7 @@ test "cdp.target: createTarget" {
     {
         var ctx = testing.context();
         defer ctx.deinit();
-        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about/blank" } });
+        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about:blank" } });
 
         // should create a browser context
         const bc = ctx.cdp().browser_context.?;
@@ -529,7 +533,7 @@ test "cdp.target: createTarget" {
         defer ctx.deinit();
         // active auto attach to get the Target.attachedToTarget event.
         try ctx.processMessage(.{ .id = 9, .method = "Target.setAutoAttach", .params = .{ .autoAttach = true, .waitForDebuggerOnStart = false } });
-        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about/blank" } });
+        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about:blank" } });
 
         // should create a browser context
         const bc = ctx.cdp().browser_context.?;

src/http/Client.zig

@@ -93,6 +93,11 @@ notification: ?*Notification = null,
 // restoring, this originally-configured value is what it goes to.
 http_proxy: ?[:0]const u8 = null,
 
+// track if the client use a proxy for connections.
+// We can't use http_proxy because we want also to track proxy configured via
+// CDP.
+use_proxy: bool,
+
 // The complete user-agent header line
 user_agent: [:0]const u8,
 
@@ -126,6 +131,7 @@ pub fn init(allocator: Allocator, ca_blob: ?c.curl_blob, opts: Http.Opts) !*Clie
         .handles = handles,
         .allocator = allocator,
         .http_proxy = opts.http_proxy,
+        .use_proxy = opts.http_proxy != null,
         .user_agent = opts.user_agent,
         .transfer_pool = transfer_pool,
     };
@@ -315,6 +321,7 @@ pub fn changeProxy(self: *Client, proxy: [:0]const u8) !void {
     for (self.handles.handles) |*h| {
         try errorCheck(c.curl_easy_setopt(h.conn.easy, c.CURLOPT_PROXY, proxy.ptr));
     }
+    self.use_proxy = true;
 }
 
 // Same restriction as changeProxy. Should be ok since this is only called on
@@ -326,6 +333,37 @@ pub fn restoreOriginalProxy(self: *Client) !void {
     for (self.handles.handles) |*h| {
         try errorCheck(c.curl_easy_setopt(h.conn.easy, c.CURLOPT_PROXY, proxy));
     }
+    self.use_proxy = proxy != null;
+}
+
+// Enable TLS verification on all connections.
+pub fn enableTlsVerify(self: *const Client) !void {
+    for (self.handles.handles) |*h| {
+        const easy = h.conn.easy;
+
+        try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_SSL_VERIFYHOST, @as(c_long, 2)));
+        try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_SSL_VERIFYPEER, @as(c_long, 1)));
+
+        if (self.use_proxy) {
+            try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_PROXY_SSL_VERIFYHOST, @as(c_long, 2)));
+            try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_PROXY_SSL_VERIFYPEER, @as(c_long, 1)));
+        }
+    }
+}
+
+// Disable TLS verification on all connections.
+pub fn disableTlsVerify(self: *const Client) !void {
+    for (self.handles.handles) |*h| {
+        const easy = h.conn.easy;
+
+        try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_SSL_VERIFYHOST, @as(c_long, 0)));
+        try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_SSL_VERIFYPEER, @as(c_long, 0)));
+
+        if (self.use_proxy) {
+            try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_PROXY_SSL_VERIFYHOST, @as(c_long, 0)));
+            try errorCheck(c.curl_easy_setopt(easy, c.CURLOPT_PROXY_SSL_VERIFYPEER, @as(c_long, 0)));
+        }
+    }
 }
 
 fn makeRequest(self: *Client, handle: *Handle, transfer: *Transfer) !void {
@@ -808,7 +846,7 @@ pub const Transfer = struct {
         self.deinit();
     }
 
-    // abortAuthChallenge is called when an auth chanllenge interception is
+    // abortAuthChallenge is called when an auth challenge interception is
     // abort. We don't call self.client.endTransfer here b/c it has been done
     // before interception process.
     pub fn abortAuthChallenge(self: *Transfer) void {

src/main.zig

@@ -373,7 +373,11 @@ const Command = struct {
             \\                Defaults to
         ++ (if (builtin.mode == .Debug) " pretty." else " logfmt.") ++
             \\
-            \\ --user_agent_suffix
+            \\--log_filter_scopes
+            \\                Filter out too verbose logs per scope:
+            \\                http, unknown_prop, script_event, ...
+            \\
+            \\--user_agent_suffix
             \\                Suffix to append to the Lightpanda/X.Y User-Agent
             \\
         ;

src/server.zig

@@ -487,7 +487,7 @@ pub const Client = struct {
     }
 
     // called by CDP
-    // Websocket frames have a variable lenght header. For server-client,
+    // Websocket frames have a variable length header. For server-client,
     // it could be anywhere from 2 to 10 bytes. Our IO.Loop doesn't have
     // writev, so we need to get creative. We'll JSON serialize to a
     // buffer, where the first 10 bytes are reserved. We can then backfill

src/testing.zig

@@ -402,19 +402,13 @@ pub fn htmlRunner(file: []const u8) !void {
 
     const url = try std.fmt.allocPrint(arena_allocator, "http://localhost:9582/src/tests/{s}", .{file});
     try page.navigate(url, .{});
-    _ = page.wait(2000);
+    test_session.fetchWait(2000);
+
     // page exits more aggressively in tests. We want to make sure this is called
     // at lease once.
     page.session.browser.runMicrotasks();
     page.session.browser.runMessageLoop();
 
-    const needs_second_wait = try js_context.exec("testing._onPageWait.length > 0", "check_onPageWait");
-    if (needs_second_wait.value.toBool(page.js.isolate)) {
-        // sets the isSecondWait flag in testing.
-        _ = js_context.exec("testing._isSecondWait = true", "set_second_wait_flag") catch {};
-        _ = page.wait(2000);
-    }
-
     @import("root").js_runner_duration += std.time.Instant.since(try std.time.Instant.now(), start);
 
     const value = js_context.exec("testing.getStatus()", "testing.getStatus()") catch |err| {

src/tests/dom/element.html

@@ -168,35 +168,35 @@
 
 <script id=dimensions>
   const para = document.getElementById('para');
-  testing.expectEqual(1, para.clientWidth);
-  testing.expectEqual(1, para.clientHeight);
+  testing.expectEqual(5, para.clientWidth);
+  testing.expectEqual(5, para.clientHeight);
 
-  // let r1 = document.getElementById('para').getBoundingClientRect();
-  // testing.expectEqual(0, r1.x);
-  // testing.expectEqual(0, r1.y);
-  // testing.expectEqual(1, r1.width);
-  // testing.expectEqual(2, r1.height);
+  let r1 = document.getElementById('para').getBoundingClientRect();
+  testing.expectEqual(0, r1.x);
+  testing.expectEqual(0, r1.y);
+  testing.expectEqual(5, r1.width);
+  testing.expectEqual(5, r1.height);
 
-  // let r2 = document.getElementById('content').getBoundingClientRect();
-  // testing.expectEqual(1, r2.x);
-  // testing.expectEqual(0, r2.y);
-  // testing.expectEqual(1, r2.width);
-  // testing.expectEqual(1, r2.height);
+  let r2 = document.getElementById('content').getBoundingClientRect();
+  testing.expectEqual(5, r2.x);
+  testing.expectEqual(0, r2.y);
+  testing.expectEqual(5, r2.width);
+  testing.expectEqual(5, r2.height);
 
-  // let r3 = document.getElementById('para').getBoundingClientRect();
-  // testing.expectEqual(0, r3.x);
-  // testing.expectEqual(0, r3.y);
-  // testing.expectEqual(1, r3.width);
-  // testing.expectEqual(1, r3.height);
+  let r3 = document.getElementById('para').getBoundingClientRect();
+  testing.expectEqual(0, r3.x);
+  testing.expectEqual(0, r3.y);
+  testing.expectEqual(5, r3.width);
+  testing.expectEqual(5, r3.height);
 
-  // testing.expectEqual(1, para.clientWidth);
-  // testing.expectEqual(1, para.clientHeight);
+  testing.expectEqual(10, para.clientWidth);
+  testing.expectEqual(5, para.clientHeight);
 
-  // let r4 = document.createElement('div').getBoundingClientRect();
-  // testing.expectEqual(0, r4.x);
-  // testing.expectEqual(0, r4.y);
-  // testing.expectEqual(0, r4.width);
-  // testing.expectEqual(0, r4.height);
+  let r4 = document.createElement('div').getBoundingClientRect();
+  testing.expectEqual(0, r4.x);
+  testing.expectEqual(0, r4.y);
+  testing.expectEqual(0, r4.width);
+  testing.expectEqual(0, r4.height);
 </script>
 
 <script id=matches>

src/tests/dom/intersection_observer.html

@@ -122,13 +122,13 @@
       testing.expectEqual(1, entry.intersectionRatio);
       testing.expectEqual(0, entry.intersectionRect.x);
       testing.expectEqual(0, entry.intersectionRect.y);
-      testing.expectEqual(1, entry.intersectionRect.width);
-      testing.expectEqual(1, entry.intersectionRect.height);
+      testing.expectEqual(5, entry.intersectionRect.width);
+      testing.expectEqual(5, entry.intersectionRect.height);
       testing.expectEqual(true, entry.isIntersecting);
       testing.expectEqual(0, entry.rootBounds.x);
       testing.expectEqual(0, entry.rootBounds.y);
-      testing.expectEqual(1, entry.rootBounds.width);
-      testing.expectEqual(1, entry.rootBounds.height);
+      testing.expectEqual(5, entry.rootBounds.width);
+      testing.expectEqual(5, entry.rootBounds.height);
       testing.expectEqual('[object HTMLDivElement]', entry.target.toString());
     });
   }

src/tests/dom/node.html

@@ -7,6 +7,7 @@
     <p id="para"> And</p>
     <!--comment-->
   </div>
+  <div id="rootNodeComposed"></div>
 </body>
 
 <script src="../testing.js"></script>
@@ -36,6 +37,26 @@ let first_child = content.firstChild.nextSibling; // nextSibling because of line
   testing.expectEqual('HTMLDocument', content.getRootNode().__proto__.constructor.name);
 </script>
 
+<script id=getRootNodeComposed>
+  const testContainer = $('#rootNodeComposed');
+  const shadowHost = document.createElement('div');
+  testContainer.appendChild(shadowHost);
+  const shadowRoot = shadowHost.attachShadow({ mode: 'open' });
+  const shadowChild = document.createElement('span');
+  shadowRoot.appendChild(shadowChild);
+
+  testing.expectEqual('ShadowRoot', shadowChild.getRootNode().__proto__.constructor.name);
+  testing.expectEqual('ShadowRoot', shadowChild.getRootNode({ composed: false }).__proto__.constructor.name);
+  testing.expectEqual('HTMLDocument', shadowChild.getRootNode({ composed: true }).__proto__.constructor.name);
+  testing.expectEqual('HTMLDocument', shadowHost.getRootNode().__proto__.constructor.name);
+
+  const disconnected = document.createElement('div');
+  const disconnectedChild = document.createElement('span');
+  disconnected.appendChild(disconnectedChild);
+  testing.expectEqual('HTMLDivElement', disconnectedChild.getRootNode().__proto__.constructor.name);
+  testing.expectEqual('HTMLDivElement', disconnectedChild.getRootNode({ composed: true }).__proto__.constructor.name);
+</script>
+
 <script id=firstChild>
   let body_first_child = document.body.firstChild;
   testing.expectEqual('div', body_first_child.localName);

src/tests/events/composition.html

@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<script src="../testing.js"></script>
+
+<script id=noNata>
+  {
+    let event = new CompositionEvent("test", {});
+    testing.expectEqual(true, event instanceof CompositionEvent);
+    testing.expectEqual(true, event instanceof Event);
+
+    testing.expectEqual("test", event.type);
+    testing.expectEqual("", event.data);
+  }
+</script>
+
+<script id=withData>
+  {
+    let event = new CompositionEvent("test2", {data: "over 9000!"});
+    testing.expectEqual("test2", event.type);
+    testing.expectEqual("over 9000!", event.data);
+  }
+</script>
+
+<script id=dispatch>
+  {
+    let called = 0;
+    document.addEventListener('CE', (e) => {
+      testing.expectEqual('test-data', e.data);
+      testing.expectEqual(true, e instanceof CompositionEvent);
+      called += 1
+    });
+
+    document.dispatchEvent(new CompositionEvent('CE', {data: 'test-data'}));
+    testing.expectEqual(1, called);
+  }
+</script>
+

src/tests/file/blob.html

@@ -0,0 +1,125 @@
+<!DOCTYPE html>
+<script src="../testing.js"></script>
+
+<script id=Blob/Blob.text>
+  {
+    const parts = ["\r\nthe quick brown\rfo\rx\r", "\njumps over\r\nthe\nlazy\r", "\ndog"];
+    // "transparent" ending should not modify the final buffer.
+    const blob = new Blob(parts, { type: "text/html" });
+
+    const expected = parts.join("");
+    testing.expectEqual(expected.length, blob.size);
+    testing.expectEqual("text/html", blob.type);
+    testing.async(blob.text(), result => testing.expectEqual(expected, result));
+  }
+
+  {
+    const parts = ["\rhello\r", "\nwor\r\nld"];
+    // "native" ending should modify the final buffer.
+    const blob = new Blob(parts, { endings: "native" });
+
+    const expected = "\nhello\n\nwor\nld";
+    testing.expectEqual(expected.length, blob.size);
+    testing.async(blob.text(), result => testing.expectEqual(expected, result));
+
+    testing.async(blob.arrayBuffer(), result => testing.expectEqual(true, result instanceof ArrayBuffer));
+  }
+</script>
+
+<script id=Blob.stream>
+  {
+    const parts = ["may", "thy", "knife", "chip", "and", "shatter"];
+    const blob = new Blob(parts);
+    const reader = blob.stream().getReader();
+
+    testing.async(reader.read(), ({ done, value }) => {
+      const expected = new Uint8Array([109, 97, 121, 116, 104, 121, 107, 110,
+                                       105, 102, 101, 99, 104, 105, 112, 97,
+                                       110, 100, 115, 104, 97, 116, 116, 101,
+                                       114]);
+      testing.expectEqual(false, done);
+      testing.expectEqual(true, value instanceof Uint8Array);
+      testing.expectEqual(expected, value);
+    });
+  }
+</script>
+
+<script id=Blob.arrayBuffer/Blob.slice>
+  {
+    const parts = ["la", "symphonie", "des", "éclairs"];
+    const blob = new Blob(parts);
+    testing.async(blob.arrayBuffer(), result => testing.expectEqual(true, result instanceof ArrayBuffer));
+
+    let temp = blob.slice(0);
+    testing.expectEqual(blob.size, temp.size);
+    testing.async(temp.text(), result => {
+      testing.expectEqual("lasymphoniedeséclairs", result);
+    });
+
+    temp = blob.slice(-4, -2, "custom");
+    testing.expectEqual(2, temp.size);
+    testing.expectEqual("custom", temp.type);
+    testing.async(temp.text(), result => testing.expectEqual("ai", result));
+
+    temp = blob.slice(14);
+    testing.expectEqual(8, temp.size);
+    testing.async(temp.text(), result => testing.expectEqual("éclairs", result));
+
+    temp = blob.slice(6, -10, "text/eclair");
+    testing.expectEqual(6, temp.size);
+    testing.expectEqual("text/eclair", temp.type);
+    testing.async(temp.text(), result => testing.expectEqual("honied", result));
+  }
+</script>
+
+<!-- Firefox and Safari only -->
+<script id=Blob.bytes>
+  {
+    const parts = ["light ", "panda ", "rocks ", "!"];
+    const blob = new Blob(parts);
+
+    testing.async(blob.bytes(), result => {
+      const expected = new Uint8Array([108, 105, 103, 104, 116, 32, 112, 97,
+                                       110, 100, 97, 32, 114, 111, 99, 107, 115,
+                                       32, 33]);
+      testing.expectEqual(true, result instanceof Uint8Array);
+      testing.expectEqual(expected, result);
+    });
+  }
+
+  // Test for SIMD.
+  {
+    const parts = [
+      "\rThe opened package\r\nof potato\nchi\rps",
+      "held the\r\nanswer to the\r mystery. Both det\rectives looke\r\rd\r",
+      "\rat it but failed to realize\nit was\r\nthe\rkey\r\n",
+      "\r\nto solve the \rcrime.\r"
+    ];
+
+    const blob = new Blob(parts, { type: "text/html", endings: "native" });
+    testing.expectEqual(161, blob.size);
+    testing.expectEqual("text/html", blob.type);
+    testing.async(blob.bytes(), result => {
+      const expected = new Uint8Array([10, 84, 104, 101, 32, 111, 112, 101, 110,
+                                       101, 100, 32, 112, 97, 99, 107, 97, 103,
+                                       101, 10, 111, 102, 32, 112, 111, 116, 97,
+                                       116, 111, 10, 99, 104, 105, 10, 112, 115,
+                                       104, 101, 108, 100, 32, 116, 104, 101, 10,
+                                       97, 110, 115, 119, 101, 114, 32, 116, 111,
+                                       32, 116, 104, 101, 10, 32, 109, 121, 115,
+                                       116, 101, 114, 121, 46, 32, 66, 111, 116,
+                                       104, 32, 100, 101, 116, 10, 101, 99, 116,
+                                       105, 118, 101, 115, 32, 108, 111, 111, 107,
+                                       101, 10, 10, 100, 10, 10, 97, 116, 32, 105,
+                                       116, 32, 98, 117, 116, 32, 102, 97, 105, 108,
+                                       101, 100, 32, 116, 111, 32, 114, 101, 97,
+                                       108, 105, 122, 101, 10, 105, 116, 32, 119, 97,
+                                       115, 10, 116, 104, 101, 10, 107, 101, 121,
+                                       10, 10, 116, 111, 32, 115, 111, 108, 118, 101,
+                                       32, 116, 104, 101, 32, 10, 99, 114, 105, 109,
+                                       101, 46, 10]);
+      testing.expectEqual(true, result instanceof Uint8Array);
+      testing.expectEqual(expected, result);
+    });
+  }
+</script>

src/tests/file/file.html

@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <script src="../testing.js"></script>
+
 <script id=file>
-  let f = new File()
+  let f = new File();
   testing.expectEqual(true, f instanceof File);
 </script>

src/tests/html/document.html

@@ -46,15 +46,15 @@
   testing.expectEqual('name=Oeschger; favorite_food=tripe', document.cookie);
 
   // Return null since we only return elements when they have previously been localized
-  testing.expectEqual(null, document.elementFromPoint(0.5, 0.5));
-  testing.expectEqual([], document.elementsFromPoint(0.5, 0.5));
+  testing.expectEqual(null, document.elementFromPoint(2.5, 2.5));
+  testing.expectEqual([], document.elementsFromPoint(2.5, 2.5));
 
   let div1 = document.createElement('div');
   document.body.appendChild(div1);
   div1.getClientRects(); // clal this to position it
-  testing.expectEqual('[object HTMLDivElement]', document.elementFromPoint(0.5, 0.5).toString());
+  testing.expectEqual('[object HTMLDivElement]', document.elementFromPoint(2.5, 2.5).toString());
 
-  let elems = document.elementsFromPoint(0.5, 0.5);
+  let elems = document.elementsFromPoint(2.5, 2.5);
   testing.expectEqual(3, elems.length);
   testing.expectEqual('[object HTMLDivElement]', elems[0].toString());
   testing.expectEqual('[object HTMLBodyElement]', elems[1].toString());
@@ -66,11 +66,11 @@
   // Note this will be placed after the div of previous test
   a.getClientRects();
 
-  let a_again = document.elementFromPoint(1.5, 0.5);
+  let a_again = document.elementFromPoint(7.5, 0.5);
   testing.expectEqual('[object HTMLAnchorElement]', a_again.toString());
   testing.expectEqual('https://lightpanda.io', a_again.href);
 
-  let a_agains = document.elementsFromPoint(1.5, 0.5);
+  let a_agains = document.elementsFromPoint(7.5, 0.5);
   testing.expectEqual('https://lightpanda.io', a_agains[0].href);
 
 

src/tests/html/history/history.html

@@ -1,21 +1,22 @@
 <!DOCTYPE html>
-<script src="../testing.js"></script>
+<script src="../../testing.js"></script>
 
 <script id=history>
     testing.expectEqual('auto', history.scrollRestoration);
 
     history.scrollRestoration = 'manual';
-    history.scrollRestoration = 'foo';
     testing.expectEqual('manual', history.scrollRestoration);
 
     history.scrollRestoration = 'auto';
     testing.expectEqual('auto', history.scrollRestoration);
     testing.expectEqual(null, history.state)
 
-    history.pushState({ testInProgress: true }, null, 'http://127.0.0.1:9582/xhr/json');
+    history.pushState({ testInProgress: true }, null, 'http://127.0.0.1:9582/src/tests/html/history/history_after_nav.html');
     testing.expectEqual({ testInProgress: true }, history.state);
 
+    history.pushState({ testInProgress: false }, null, 'http://127.0.0.1:9582/xhr/json');
     history.replaceState({ "new": "field", testComplete: true }, null);
+
     let state = { "new": "field", testComplete: true };
     testing.expectEqual(state, history.state);
 
@@ -32,10 +33,5 @@
       testing.expectEqual(state, popstateEventState);
     })
 
-    testing.onPageWait(() => {
-      testing.expectEqual(true, history.state && history.state.testComplete);
-      testing.expectEqual(state, history.state);
-    });
-
-    testing.expectEqual(undefined, history.go());
+    history.back();
 </script>

src/tests/html/history/history2.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<script src="../../testing.js"></script>
+
+<script id=history2>
+    history.pushState(
+      {"new": "field", testComplete: true },
+      null,
+      'http://127.0.0.1:9582/src/tests/html/history/history_after_nav.html'
+    );
+
+    let popstateEventFired = false;
+    let popstateEventState = null;
+
+    // uses the window event listener.
+    window.onpopstate = (event) => {
+        popstateEventFired = true;
+        popstateEventState = event.state;
+    };
+    
+    testing.eventually(() => {
+      testing.expectEqual(true, popstateEventFired);
+      testing.expectEqual(true, popstateEventState.testComplete);
+    })
+
+    history.back();
+</script>

src/tests/html/history/history_after_nav.html

@@ -0,0 +1,6 @@
+<!DOCTYPE html>
+<script src="../../testing.js"></script>
+
+<script id=history2>
+    testing.expectEqual(true, history.state && history.state.testInProgress);
+</script>

src/tests/html/link.html

@@ -16,8 +16,8 @@
   testing.expectEqual('https://lightpanda.io', link.origin);
 
   link.host = 'lightpanda.io:443';
-  testing.expectEqual('lightpanda.io:443', link.host);
-  testing.expectEqual('443', link.port);
+  testing.expectEqual('lightpanda.io', link.host);
+  testing.expectEqual('', link.port);
   testing.expectEqual('lightpanda.io', link.hostname);
 
   link.host = 'lightpanda.io';
@@ -42,9 +42,9 @@
 
   testing.expectEqual('', link.port);
   link.port = '443';
-  testing.expectEqual('foo.bar:443', link.host);
+  testing.expectEqual('foo.bar', link.host);
   testing.expectEqual('foo.bar', link.hostname);
-  testing.expectEqual('https://foo.bar:443/?q=bar#frag', link.href);
+  testing.expectEqual('https://foo.bar/?q=bar#frag', link.href);
   link.port = null;
   testing.expectEqual('https://foo.bar/?q=bar#frag', link.href);
 

src/tests/html/location.html

@@ -13,3 +13,21 @@
   testing.expectEqual("9582", location.port);
   testing.expectEqual("", location.search);
 </script>
+
+<script id=location_hash>
+  location.hash = "";
+  testing.expectEqual("", location.hash);
+  testing.expectEqual('http://localhost:9582/src/tests/html/location.html', location.href);
+
+  location.hash = "#abcdef";
+  testing.expectEqual("#abcdef", location.hash);
+  testing.expectEqual('http://localhost:9582/src/tests/html/location.html#abcdef', location.href);
+
+  location.hash = "xyzxyz";
+  testing.expectEqual("#xyzxyz", location.hash);
+  testing.expectEqual('http://localhost:9582/src/tests/html/location.html#xyzxyz', location.href);
+
+  location.hash = "";
+  testing.expectEqual("", location.hash);
+  testing.expectEqual('http://localhost:9582/src/tests/html/location.html', location.href);
+</script>

src/tests/html/navigation/navigation.html

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<script src="../../testing.js"></script>
+
+<script id=navigation>
+    testing.expectEqual('object', typeof navigation);
+    testing.expectEqual('object', typeof navigation.currentEntry);
+    
+    testing.expectEqual('string', typeof navigation.currentEntry.id);
+    testing.expectEqual('string', typeof navigation.currentEntry.key);
+    testing.expectEqual('string', typeof navigation.currentEntry.url);
+
+    const currentIndex = navigation.currentEntry.index;
+
+    navigation.navigate(
+        'http://localhost:9582/src/tests/html/navigation/navigation2.html',
+        { state: { currentIndex: currentIndex, navTestInProgress: true } }
+    );
+</script>

src/tests/html/navigation/navigation2.html

@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<script src="../../testing.js"></script>
+
+<script id=navigation2>
+    const state = navigation.currentEntry.getState();
+    testing.expectEqual(true, state.navTestInProgress);
+    testing.expectEqual(state.currentIndex + 1, navigation.currentEntry.index);
+</script>

src/tests/html/navigation/navigation_currententrychange.html

@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<script src="../../testing.js"></script>
+
+<script id=navigation_currententrychange>
+    let currentEntryChanged = false;
+
+    navigation.addEventListener("currententrychange", () => {
+      currentEntryChanged = true;
+    });
+
+    // Doesn't fully navigate if same document.
+    location.href = location.href + "#1";
+
+    testing.expectEqual(true, currentEntryChanged);
+</script>

src/tests/html/script/order.html

@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<script src="../../testing.js"></script>
+
+<script defer id="remote_defer" src="order_defer.js"></script>
+<script defer id="remote_async" src="order_async.js"></script>
+
+<script type=module id="inline_module">
+    // inline module is always deferred.
+    list += 'g';
+    testing.expectEqual('abcdefg', list);
+</script>
+
+<script>
+    var list = '';
+</script>
+
+<script id="remote" src="order.js"></script>
+
+<script async id="inline_async">
+    // inline script ignore async
+    list += 'b';
+    testing.expectEqual('ab', list);
+</script>
+
+<script defer id="inline_defer">
+    // inline script ignore defer
+    list += 'c';
+    testing.expectEqual('abc', list);
+</script>
+
+<script id="default">
+    // simple inline script
+    list += 'd';
+    testing.expectEqual('abcd', list);
+</script>

src/tests/html/script/order.js

@@ -0,0 +1,2 @@
+list += 'a';
+testing.expectEqual('a', list);

src/tests/html/script/order_async.js

@@ -0,0 +1,3 @@
+list += 'f';
+testing.expectEqual('abcdef', list);
+

src/tests/html/script/order_defer.js

@@ -0,0 +1,2 @@
+list += 'e';
+testing.expectEqual('abcde', list);

src/tests/testing.js

@@ -51,14 +51,6 @@
     // if we're already in a fail state, return fail, nothing can recover this
     if (testing._status === 'fail') return 'fail';
 
-    if (testing._isSecondWait) {
-      for (const pw of (testing._onPageWait)) {
-        testing._captured = pw[1];
-        pw[0]();
-        testing._captured = null;
-      }
-    }
-
     // run any eventually's that we've captured
     for (const ev of testing._eventually) {
       testing._captured = ev[1];
@@ -101,18 +93,6 @@
     _registerErrorCallback();
   }
 
-  // Set expectations to happen on the next time that `page.wait` is executed.
-  //
-  // History specifically uses this as it queues navigation that needs to be checked
-  // when the next page is loaded.
-  function onPageWait(fn) {
-    // Store callbacks to run when page.wait() happens
-    testing._onPageWait.push([fn, {
-      script_id: document.currentScript.id,
-      stack: new Error().stack,
-    }]);
-  }
-
   async function async(promise, cb) {
     const script_id = document.currentScript ? document.currentScript.id : '<script id is unavailable in browsers>';
     const stack = new Error().stack;
@@ -192,15 +172,12 @@
   window.testing = {
     _status: 'empty',
     _eventually: [],
-    _onPageWait: [],
     _executed_scripts: new Set(),
     _captured: null,
-    _isSecondWait: false,
     skip: skip,
     async: async,
     getStatus: getStatus,
     eventually: eventually,
-    onPageWait: onPageWait,
     expectEqual: expectEqual,
     expectError: expectError,
     withError: withError,

src/tests/url/url.html

@@ -64,6 +64,23 @@
   testing.expectEqual(null, url.searchParams.get('a'));
 </script>
 
+<script id=searchParamsSetHref>
+  url = new URL("https://foo.bar");
+  const searchParams = url.searchParams;
+
+  // SearchParams should be empty.
+  testing.expectEqual(0, searchParams.size);
+
+  url.href = "https://lightpanda.io?over=9000&light=panda";
+  // It won't hurt to check href and host too.
+  testing.expectEqual("https://lightpanda.io/?over=9000&light=panda", url.href);
+  testing.expectEqual("lightpanda.io", url.host);
+  // SearchParams should be updated too when URL is set.
+  testing.expectEqual(2, searchParams.size);
+  testing.expectEqual("9000", searchParams.get("over"));
+  testing.expectEqual("panda", searchParams.get("light"));
+</script>
+
 <script id=base>
   url = new URL('over?9000', 'https://lightpanda.io');
   testing.expectEqual("https://lightpanda.io/over?9000", url.href);
@@ -78,6 +95,15 @@
 </script>
 
 <script id=invalidUrl>
-  let u = new URL("://foo.bar/path?query#fragment");
-  testing.expectEqual(":", u.protocol);
+  testing.expectError("Error: Invalid", () => {
+    _ = new URL("://foo.bar/path?query#fragment");
+  });
+</script>
+
+<script id=URL.canParse>
+  testing.expectEqual(true, URL.canParse("https://lightpanda.io"));
+  testing.expectEqual(false, URL.canParse("://lightpanda.io"));
+
+  testing.expectEqual(true, URL.canParse("/home", "https://lightpanda.io"));
+  testing.expectEqual(false, URL.canParse("lightpanda.io", "https"));
 </script>

src/tests/window/window.html

@@ -25,9 +25,9 @@
 </script>
 
 <script id=dimensions>
-  testing.expectEqual(1, innerHeight);
-  // Width is 1 even if there are no elements
-  testing.expectEqual(1, innerWidth);
+  testing.expectEqual(5, innerHeight);
+  // Width is 5 even if there are no elements
+  testing.expectEqual(5, innerWidth);
 
   let div1 = document.createElement('div');
   document.body.appendChild(div1);
@@ -37,8 +37,8 @@
   document.body.appendChild(div2);
   div2.getClientRects();
 
-  testing.expectEqual(1, innerHeight);
-  testing.expectEqual(2, innerWidth);
+  testing.expectEqual(5, innerHeight);
+  testing.expectEqual(10, innerWidth);
 </script>
 
 <script id=setTimeout>
@@ -149,3 +149,19 @@
 
   testing.eventually(() => testing.expectEqual(true, isWindowTarget));
 </script>
+
+<script id=reportError>
+  let errorEventFired = false;
+  let capturedError = null;
+
+  window.addEventListener('error', (e) => {
+    errorEventFired = true;
+    capturedError = e.error;
+  });
+
+  const testError = new Error('Test error message');
+  window.reportError(testError);
+
+  testing.expectEqual(true, errorEventFired);
+  testing.expectEqual(testError, capturedError);
+</script>

src/url.zig

@@ -75,26 +75,42 @@ pub const URL = struct {
         return writer.writeAll(self.raw);
     }
 
-    pub fn toWebApi(self: *const URL, allocator: Allocator) !WebApiURL {
-        return WebApiURL.init(allocator, self.uri);
-    }
-
     /// Properly stitches two URL fragments together.
     ///
     /// For URLs with a path, it will replace the last entry with the src.
     /// For URLs without a path, it will add src as the path.
     pub fn stitch(
         allocator: Allocator,
-        path: []const u8,
-        base: []const u8,
+        raw_path: []const u8,
+        raw_base: []const u8,
         comptime opts: StitchOpts,
     ) !StitchReturn(opts) {
-        if (base.len == 0 or isCompleteHTTPUrl(path)) {
-            return simpleStitch(allocator, path, opts);
+        const trimmed_path = std.mem.trim(u8, raw_path, &.{ '\n', '\r' });
+
+        if (raw_base.len == 0 or isCompleteHTTPUrl(trimmed_path)) {
+            return simpleStitch(allocator, trimmed_path, opts);
         }
 
+        if (trimmed_path.len == 0) {
+            return simpleStitch(allocator, raw_base, opts);
+        }
+
+        // base should get stripped of its hash whenever we are stitching.
+        const base = if (std.mem.indexOfScalar(u8, raw_base, '#')) |hash_pos|
+            raw_base[0..hash_pos]
+        else
+            raw_base;
+
+        const path_hash_start = std.mem.indexOfScalar(u8, trimmed_path, '#');
+        const path = if (path_hash_start) |pos| trimmed_path[0..pos] else trimmed_path;
+        const hash = if (path_hash_start) |pos| trimmed_path[pos..] else "";
+
+        // if path is just hash, we just append it to base.
         if (path.len == 0) {
-            return simpleStitch(allocator, base, opts);
+            if (comptime opts.null_terminated) {
+                return std.fmt.allocPrintSentinel(allocator, "{s}{s}", .{ base, hash }, 0);
+            }
+            return std.fmt.allocPrint(allocator, "{s}{s}", .{ base, hash });
         }
 
         if (std.mem.startsWith(u8, path, "//")) {
@@ -105,9 +121,9 @@ pub const URL = struct {
 
             const protocol = base[0..index];
             if (comptime opts.null_terminated) {
-                return std.fmt.allocPrintSentinel(allocator, "{s}:{s}", .{ protocol, path }, 0);
+                return std.fmt.allocPrintSentinel(allocator, "{s}:{s}{s}", .{ protocol, path, hash }, 0);
             }
-            return std.fmt.allocPrint(allocator, "{s}:{s}", .{ protocol, path });
+            return std.fmt.allocPrint(allocator, "{s}:{s}{s}", .{ protocol, path, hash });
         }
 
         // Quick hack because domains have to be at least 3 characters.
@@ -128,25 +144,28 @@ pub const URL = struct {
             return std.fmt.allocPrint(allocator, "{s}{s}", .{ root, path });
         }
 
-        var old_path = std.mem.trimStart(u8, base[root.len..], "/");
-        if (std.mem.lastIndexOfScalar(u8, old_path, '/')) |pos| {
-            old_path = old_path[0..pos];
+        var oldraw_path = std.mem.trimStart(u8, base[root.len..], "/");
+        if (std.mem.lastIndexOfScalar(u8, oldraw_path, '/')) |pos| {
+            oldraw_path = oldraw_path[0..pos];
         } else {
-            old_path = "";
+            oldraw_path = "";
         }
 
         // We preallocate all of the space possibly needed.
-        // This is the root, old_path, new path, 3 slashes and perhaps a null terminated slot.
-        var out = try allocator.alloc(u8, root.len + old_path.len + path.len + 3 + if (comptime opts.null_terminated) 1 else 0);
+        // This is the root, oldraw_path, new path, 3 slashes and perhaps a null terminated slot.
+        var out = try allocator.alloc(
+            u8,
+            root.len + oldraw_path.len + path.len + hash.len + 3 + if (comptime opts.null_terminated) 1 else 0,
+        );
         var end: usize = 0;
         @memmove(out[0..root.len], root);
         end += root.len;
         out[root.len] = '/';
         end += 1;
         // If we don't have an old path, do nothing here.
-        if (old_path.len > 0) {
-            @memmove(out[end .. end + old_path.len], old_path);
-            end += old_path.len;
+        if (oldraw_path.len > 0) {
+            @memmove(out[end .. end + oldraw_path.len], oldraw_path);
+            end += oldraw_path.len;
             out[end] = '/';
             end += 1;
         }
@@ -184,6 +203,11 @@ pub const URL = struct {
             read += 1;
         }
 
+        if (hash.len > 0) {
+            @memmove(out[write .. write + hash.len], hash);
+            write += hash.len;
+        }
+
         if (comptime opts.null_terminated) {
             // we always have an extra space
             out[write] = 0;
@@ -217,6 +241,26 @@ pub const URL = struct {
         buf.appendSliceAssumeCapacity(query_string);
         return buf.items;
     }
+
+    // Compares two URLs, returning true if it is the same document.
+    pub fn eqlDocument(self: *const URL, other: *const URL, arena: Allocator) !bool {
+        if (!std.mem.eql(u8, self.scheme(), other.scheme())) return false;
+        if (!std.mem.eql(u8, self.host(), other.host())) return false;
+        if (self.port() != other.port()) return false;
+
+        const path1 = try self.uri.path.toRawMaybeAlloc(arena);
+        const path2 = try other.uri.path.toRawMaybeAlloc(arena);
+
+        if ((self.uri.query == null) != (other.uri.query == null)) return false;
+        if (self.uri.query) |self_query| {
+            const other_query = other.uri.query.?;
+            const query1 = try self_query.toRawMaybeAlloc(arena);
+            const query2 = try other_query.toRawMaybeAlloc(arena);
+            if (!std.mem.eql(u8, query1, query2)) return false;
+        }
+
+        return std.mem.eql(u8, path1, path2);
+    }
 };
 
 const StitchOpts = struct {
@@ -553,3 +597,92 @@ test "URL: concatQueryString" {
         try testing.expectEqual("https://www.lightpanda.io/index?1=2&a=b", url);
     }
 }
+
+test "URL: eqlDocument" {
+    defer testing.reset();
+    const arena = testing.arena_allocator;
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about", null);
+        const url2 = try URL.parse("https://lightpanda.io/about", null);
+        try testing.expectEqual(true, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about", null);
+        const url2 = try URL.parse("http://lightpanda.io/about", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about", null);
+        const url2 = try URL.parse("https://example.com/about", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io:8080/about", null);
+        const url2 = try URL.parse("https://lightpanda.io:9090/about", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about", null);
+        const url2 = try URL.parse("https://lightpanda.io/contact", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about?foo=bar", null);
+        const url2 = try URL.parse("https://lightpanda.io/about?baz=qux", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about#section1", null);
+        const url2 = try URL.parse("https://lightpanda.io/about#section2", null);
+        try testing.expectEqual(true, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about", null);
+        const url2 = try URL.parse("https://lightpanda.io/about/", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/", null);
+        const url2 = try URL.parse("https://lightpanda.io", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about?foo=bar", null);
+        const url2 = try URL.parse("https://lightpanda.io/about", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about", null);
+        const url2 = try URL.parse("https://lightpanda.io/about?foo=bar", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about?foo=bar", null);
+        const url2 = try URL.parse("https://lightpanda.io/about?foo=bar", null);
+        try testing.expectEqual(true, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://lightpanda.io/about?", null);
+        const url2 = try URL.parse("https://lightpanda.io/about", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+
+    {
+        const url1 = try URL.parse("https://duckduckgo.com/", null);
+        const url2 = try URL.parse("https://duckduckgo.com/?q=lightpanda", null);
+        try testing.expectEqual(false, try url1.eqlDocument(&url2, arena));
+    }
+}

vendor/ada/root.zig

@@ -0,0 +1,176 @@
+//! Wrappers for ada URL parser.
+//! https://github.com/ada-url/ada
+
+const c = @cImport({
+    @cInclude("ada_c.h");
+});
+
+pub const URLComponents = c.ada_url_components;
+pub const URLOmitted = c.ada_url_omitted;
+pub const String = c.ada_string;
+pub const OwnedString = c.ada_owned_string;
+/// Pointer types.
+pub const URL = c.ada_url;
+pub const URLSearchParams = c.ada_url_search_params;
+
+pub const ParseError = error{Invalid};
+
+pub fn parse(input: []const u8) ParseError!URL {
+    const url = c.ada_parse(input.ptr, input.len);
+    if (!c.ada_is_valid(url)) {
+        return error.Invalid;
+    }
+
+    return url;
+}
+
+pub fn parseWithBase(input: []const u8, base: []const u8) ParseError!URL {
+    const url = c.ada_parse_with_base(input.ptr, input.len, base.ptr, base.len);
+    if (!c.ada_is_valid(url)) {
+        return error.Invalid;
+    }
+
+    return url;
+}
+
+pub inline fn canParse(input: []const u8) bool {
+    return c.ada_can_parse(input.ptr, input.len);
+}
+
+pub inline fn canParseWithBase(input: []const u8, base: []const u8) bool {
+    return c.ada_can_parse_with_base(input.ptr, input.len, base.ptr, base.len);
+}
+
+pub inline fn getComponents(url: URL) *const URLComponents {
+    return c.ada_get_components(url);
+}
+
+pub inline fn free(url: URL) void {
+    return c.ada_free(url);
+}
+
+pub inline fn freeOwnedString(owned: OwnedString) void {
+    return c.ada_free_owned_string(owned);
+}
+
+/// Returns true if given URL is valid.
+pub inline fn isValid(url: URL) bool {
+    return c.ada_is_valid(url);
+}
+
+/// Creates a new `URL` from given `URL`.
+pub inline fn copy(url: URL) URL {
+    return c.ada_copy(url);
+}
+
+/// Contrary to other getters, this heap allocates.
+pub inline fn getOriginNullable(url: URL) OwnedString {
+    return c.ada_get_origin(url);
+}
+
+pub inline fn getHrefNullable(url: URL) String {
+    return c.ada_get_href(url);
+}
+
+pub inline fn getUsernameNullable(url: URL) String {
+    return c.ada_get_username(url);
+}
+
+pub inline fn getPasswordNullable(url: URL) String {
+    return c.ada_get_password(url);
+}
+
+pub inline fn getSearchNullable(url: URL) String {
+    return c.ada_get_search(url);
+}
+
+pub inline fn getPortNullable(url: URL) String {
+    return c.ada_get_port(url);
+}
+
+pub inline fn getHashNullable(url: URL) String {
+    return c.ada_get_hash(url);
+}
+
+pub inline fn getHostNullable(url: URL) String {
+    return c.ada_get_host(url);
+}
+
+pub inline fn getHostnameNullable(url: URL) String {
+    return c.ada_get_hostname(url);
+}
+
+pub inline fn getPathnameNullable(url: URL) String {
+    return c.ada_get_pathname(url);
+}
+
+pub inline fn getProtocolNullable(url: URL) String {
+    return c.ada_get_protocol(url);
+}
+
+pub inline fn setHref(url: URL, input: []const u8) bool {
+    return c.ada_set_href(url, input.ptr, input.len);
+}
+
+pub inline fn setHost(url: URL, input: []const u8) bool {
+    return c.ada_set_host(url, input.ptr, input.len);
+}
+
+pub inline fn setHostname(url: URL, input: []const u8) bool {
+    return c.ada_set_hostname(url, input.ptr, input.len);
+}
+
+pub inline fn setProtocol(url: URL, input: []const u8) bool {
+    return c.ada_set_protocol(url, input.ptr, input.len);
+}
+
+pub inline fn setUsername(url: URL, input: []const u8) bool {
+    return c.ada_set_username(url, input.ptr, input.len);
+}
+
+pub inline fn setPassword(url: URL, input: []const u8) bool {
+    return c.ada_set_password(url, input.ptr, input.len);
+}
+
+pub inline fn setPort(url: URL, input: []const u8) bool {
+    return c.ada_set_port(url, input.ptr, input.len);
+}
+
+pub inline fn setPathname(url: URL, input: []const u8) bool {
+    return c.ada_set_pathname(url, input.ptr, input.len);
+}
+
+pub inline fn setSearch(url: URL, input: []const u8) void {
+    return c.ada_set_search(url, input.ptr, input.len);
+}
+
+pub inline fn setHash(url: URL, input: []const u8) void {
+    return c.ada_set_hash(url, input.ptr, input.len);
+}
+
+pub inline fn clearHash(url: URL) void {
+    return c.ada_clear_hash(url);
+}
+
+pub inline fn clearSearch(url: URL) void {
+    return c.ada_clear_search(url);
+}
+
+pub inline fn clearPort(url: URL) void {
+    return c.ada_clear_port(url);
+}
+
+pub const Scheme = struct {
+    pub const http: u8 = 0;
+    pub const not_special: u8 = 1;
+    pub const https: u8 = 2;
+    pub const ws: u8 = 3;
+    pub const ftp: u8 = 4;
+    pub const wss: u8 = 5;
+    pub const file: u8 = 6;
+};
+
+/// Returns one of the constants defined in `Scheme`.
+pub inline fn getSchemeType(url: URL) u8 {
+    return c.ada_get_scheme_type(url);
+}