diff --git a/src/browser/js/bridge.zig b/src/browser/js/bridge.zig
index eccc7dc9..4319df25 100644
--- a/src/browser/js/bridge.zig
+++ b/src/browser/js/bridge.zig
@@ -563,4 +563,5 @@ pub const JsApis = flattenTypes(&.{
     @import("../webapi/MutationObserver.zig"),
     @import("../webapi/IntersectionObserver.zig"),
     @import("../webapi/CustomElementRegistry.zig"),
+    @import("../webapi/ResizeObserver.zig"),
 });
diff --git a/src/browser/tests/url.html b/src/browser/tests/url.html
index 145d368e..7faefc32 100644
--- a/src/browser/tests/url.html
+++ b/src/browser/tests/url.html
@@ -314,3 +314,51 @@
     testing.expectEqual('https://example.com/path', url.href);
   }
 </script>
+
+<script id=stringifier>
+{
+  const url1 = new URL('https://example.com/api');
+  const url2 = new URL(url1);
+  testing.expectEqual('https://example.com/api', url2.href);
+}
+
+{
+  const obj = {
+    toString() {
+      return 'https://example.com/custom';
+    }
+  };
+  const url = new URL(obj);
+  testing.expectEqual('https://example.com/custom', url.href);
+}
+
+{
+  const baseUrl = new URL('https://example.com/');
+  const url = new URL('/path', baseUrl);
+  testing.expectEqual('https://example.com/path', url.href);
+}
+
+{
+  const obj = {
+    toString() {
+      return 'https://example.com/';
+    }
+  };
+  const url = new URL('/relative', obj);
+  testing.expectEqual('https://example.com/relative', url.href);
+}
+
+{
+  const anchor = document.createElement('a');
+  anchor.href = 'https://example.com/test';
+  const url = new URL(anchor);
+  testing.expectEqual('https://example.com/test', url.href);
+}
+
+{
+  const anchor = document.createElement('a');
+  anchor.href = 'https://example.com/base/';
+  const url = new URL('relative', anchor);
+  testing.expectEqual('https://example.com/base/relative', url.href);
+}
+</script>
diff --git a/src/browser/webapi/ResizeObserver.zig b/src/browser/webapi/ResizeObserver.zig
new file mode 100644
index 00000000..544db3ee
--- /dev/null
+++ b/src/browser/webapi/ResizeObserver.zig
@@ -0,0 +1,64 @@
+// 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 js = @import("../js/js.zig");
+const Page = @import("../Page.zig");
+const Element = @import("Element.zig");
+
+pub const ResizeObserver = @This();
+
+fn init(cbk: js.Function) ResizeObserver {
+    _ = cbk;
+    return .{};
+}
+
+const Options = struct {
+    box: []const u8,
+};
+pub fn observe(self: *const ResizeObserver, element: *Element, options_: ?Options) void {
+    _ = self;
+    _ = element;
+    _ = options_;
+    return;
+}
+
+pub fn unobserve(self: *const ResizeObserver, element: *Element) void {
+    _ = self;
+    _ = element;
+    return;
+}
+
+pub fn disconnect(self: *ResizeObserver) void {
+    _ = self;
+}
+
+pub const JsApi = struct {
+    pub const bridge = js.Bridge(ResizeObserver);
+
+    pub const Meta = struct {
+        pub const name = "ResizeObserver";
+        pub const prototype_chain = bridge.prototypeChain();
+        pub var class_id: bridge.ClassId = undefined;
+        pub const empty_with_no_proto = true;
+    };
+
+    pub const constructor = bridge.constructor(ResizeObserver.init, .{});
+    pub const observe = bridge.function(ResizeObserver.observe, .{});
+    pub const disconnect = bridge.function(ResizeObserver.disconnect, .{});
+};
diff --git a/src/browser/webapi/element/html/Anchor.zig b/src/browser/webapi/element/html/Anchor.zig
index 8821ec61..47cbe9d4 100644
--- a/src/browser/webapi/element/html/Anchor.zig
+++ b/src/browser/webapi/element/html/Anchor.zig
@@ -243,6 +243,7 @@ pub const JsApi = struct {
     pub const hash = bridge.accessor(Anchor.getHash, Anchor.setHash, .{});
     pub const @"type" = bridge.accessor(Anchor.getType, Anchor.setType, .{});
     pub const text = bridge.accessor(Anchor.getText, Anchor.setText, .{});
+    pub const toString = bridge.function(Anchor.getHref, .{});
 };
 
 const testing = @import("../../../../testing.zig");