diff --git a/src/browser/ScriptManager.zig b/src/browser/ScriptManager.zig
index ee8ee01c..06e94083 100644
--- a/src/browser/ScriptManager.zig
+++ b/src/browser/ScriptManager.zig
@@ -684,7 +684,7 @@ const Script = struct {
     fn errorCallback(ctx: *anyopaque, err: anyerror) void {
         const self: *Script = @ptrCast(@alignCast(ctx));
         log.warn(.http, "script fetch error", .{
-            .err = err ,
+            .err = err,
             .req = self.url,
             .mode = self.mode,
             .kind = self.kind,
diff --git a/src/browser/js/bridge.zig b/src/browser/js/bridge.zig
index faa61a2a..7f67f3a0 100644
--- a/src/browser/js/bridge.zig
+++ b/src/browser/js/bridge.zig
@@ -288,6 +288,7 @@ pub const Iterator = struct {
 
     const Opts = struct {
         async: bool = false,
+        null_as_undefined: bool = false,
     };
 
     fn init(comptime T: type, comptime struct_or_func: anytype, comptime opts: Opts) Iterator {
diff --git a/src/browser/tests/element/class_list.html b/src/browser/tests/element/class_list.html
index 91a5d18d..d29d7612 100644
--- a/src/browser/tests/element/class_list.html
+++ b/src/browser/tests/element/class_list.html
@@ -332,3 +332,272 @@
   testing.expectEqual('a c e b f', div.className);
 }
 </script>
+
+<script id=toString>
+{
+  const div = document.createElement('div');
+  div.className = 'foo bar baz';
+
+  testing.expectEqual('foo bar baz', div.classList.toString());
+
+  div.className = '';
+  testing.expectEqual('', div.classList.toString());
+
+  div.className = '  alpha   beta  ';
+  testing.expectEqual('  alpha   beta  ', div.classList.toString());
+}
+</script>
+
+<script id=keys_iterator>
+{
+  const div = document.createElement('div');
+  div.className = 'one two three';
+
+  const keys = [];
+  const iter = div.classList.keys();
+
+  let result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual(0, result.value);
+  keys.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual(1, result.value);
+  keys.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual(2, result.value);
+  keys.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(true, result.done);
+  testing.expectEqual(undefined, result.value);
+
+  testing.expectEqual([0, 1, 2], keys);
+}
+</script>
+
+<script id=keys_for_of>
+{
+  const div = document.createElement('div');
+  div.className = 'alpha beta gamma';
+
+  const keys = [];
+  for (const key of div.classList.keys()) {
+    keys.push(key);
+  }
+  testing.expectEqual([0, 1, 2], keys);
+}
+</script>
+
+<script id=values_iterator>
+{
+  const div = document.createElement('div');
+  div.className = 'red green blue';
+
+  const values = [];
+  const iter = div.classList.values();
+
+  let result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual('red', result.value);
+  values.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual('green', result.value);
+  values.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual('blue', result.value);
+  values.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(true, result.done);
+  testing.expectEqual(undefined, result.value);
+
+  testing.expectEqual(['red', 'green', 'blue'], values);
+}
+</script>
+
+<script id=values_for_of>
+{
+  const div = document.createElement('div');
+  div.className = 'x y z';
+
+  const values = [];
+  for (const value of div.classList.values()) {
+    values.push(value);
+  }
+  testing.expectEqual(['x', 'y', 'z'], values);
+}
+</script>
+
+<script id=entries_iterator>
+{
+  const div = document.createElement('div');
+  div.className = 'first second third';
+
+  const entries = [];
+  const iter = div.classList.entries();
+
+  let result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual([0, 'first'], result.value);
+  entries.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual([1, 'second'], result.value);
+  entries.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(false, result.done);
+  testing.expectEqual([2, 'third'], result.value);
+  entries.push(result.value);
+
+  result = iter.next();
+  testing.expectEqual(true, result.done);
+  testing.expectEqual(undefined, result.value);
+
+  testing.expectEqual([[0, 'first'], [1, 'second'], [2, 'third']], entries);
+}
+</script>
+
+<script id=entries_for_of>
+{
+  const div = document.createElement('div');
+  div.className = 'a b c';
+
+  const entries = [];
+  for (const entry of div.classList.entries()) {
+    entries.push(entry);
+  }
+  testing.expectEqual([[0, 'a'], [1, 'b'], [2, 'c']], entries);
+}
+</script>
+
+<script id=forEach_basic>
+{
+  const div = document.createElement('div');
+  div.className = 'red green blue';
+
+  const values = [];
+  const indices = [];
+  const lists = [];
+
+  div.classList.forEach((value, index, list) => {
+    values.push(value);
+    indices.push(index);
+    lists.push(list);
+  });
+
+  testing.expectEqual(['red', 'green', 'blue'], values);
+  testing.expectEqual([0, 1, 2], indices);
+  testing.expectEqual(3, lists.length);
+  testing.expectEqual(div.classList, lists[0]);
+  testing.expectEqual(div.classList, lists[1]);
+  testing.expectEqual(div.classList, lists[2]);
+}
+</script>
+
+<script id=forEach_with_this>
+{
+  const div = document.createElement('div');
+  div.className = 'one two';
+
+  const context = { count: 0 };
+
+  div.classList.forEach(function(value) {
+    this.count++;
+  }, context);
+
+  testing.expectEqual(2, context.count);
+}
+</script>
+
+<script id=forEach_empty_list>
+{
+  const div = document.createElement('div');
+  div.className = '';
+
+  let callCount = 0;
+  div.classList.forEach(() => {
+    callCount++;
+  });
+
+  testing.expectEqual(0, callCount);
+}
+</script>
+
+<script id=forEach_duplicates>
+{
+  const div = document.createElement('div');
+  div.className = 'foo foo bar';
+
+  const values = [];
+  div.classList.forEach((value) => {
+    values.push(value);
+  });
+
+  testing.expectEqual(['foo', 'bar'], values);
+}
+</script>
+
+<script id=iterators_empty_list>
+{
+  const div = document.createElement('div');
+  div.className = '';
+
+  const keys = [...div.classList.keys()];
+  testing.expectEqual([], keys);
+
+  const values = [...div.classList.values()];
+  testing.expectEqual([], values);
+
+  const entries = [...div.classList.entries()];
+  testing.expectEqual([], entries);
+}
+</script>
+
+<script id=iterators_with_duplicates>
+{
+  const div = document.createElement('div');
+  div.className = 'alpha alpha beta alpha';
+
+  const values = [...div.classList.values()];
+  testing.expectEqual(['alpha', 'beta'], values);
+
+  const entries = [...div.classList.entries()];
+  testing.expectEqual([[0, 'alpha'], [1, 'beta']], entries);
+}
+</script>
+
+<script id=iterator_live_behavior>
+{
+  const div = document.createElement('div');
+  div.className = 'one two three';
+
+  const iter = div.classList.values();
+
+  let result = iter.next();
+  testing.expectEqual('one', result.value);
+
+  div.classList.add('four');
+
+  result = iter.next();
+  testing.expectEqual('two', result.value);
+
+  result = iter.next();
+  testing.expectEqual('three', result.value);
+
+  result = iter.next();
+  testing.expectEqual('four', result.value);
+
+  result = iter.next();
+  testing.expectEqual(true, result.done);
+}
+</script>
diff --git a/src/browser/webapi/collections.zig b/src/browser/webapi/collections.zig
index eead81b9..3e36e05f 100644
--- a/src/browser/webapi/collections.zig
+++ b/src/browser/webapi/collections.zig
@@ -34,6 +34,8 @@ pub fn registerTypes() []const type {
         @import("collections/HTMLAllCollection.zig").Iterator,
         HTMLOptionsCollection,
         DOMTokenList,
-        DOMTokenList.Iterator,
+        DOMTokenList.KeyIterator,
+        DOMTokenList.ValueIterator,
+        DOMTokenList.EntryIterator,
     };
 }
diff --git a/src/browser/webapi/collections/DOMTokenList.zig b/src/browser/webapi/collections/DOMTokenList.zig
index 67ba027f..b47ae78d 100644
--- a/src/browser/webapi/collections/DOMTokenList.zig
+++ b/src/browser/webapi/collections/DOMTokenList.zig
@@ -17,11 +17,12 @@
 // 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 Page = @import("../../Page.zig");
 const Element = @import("../Element.zig");
 const GenericIterator = @import("iterator.zig").Entry;
-const Page = @import("../../Page.zig");
 
 pub const DOMTokenList = @This();
 
@@ -32,6 +33,10 @@ pub const DOMTokenList = @This();
 _element: *Element,
 _attribute_name: []const u8,
 
+pub const KeyIterator = GenericIterator(Iterator, "0");
+pub const ValueIterator = GenericIterator(Iterator, "1");
+pub const EntryIterator = GenericIterator(Iterator, null);
+
 const Lookup = std.StringArrayHashMapUnmanaged(void);
 
 const WHITESPACE = " \t\n\r\x0C";
@@ -158,21 +163,40 @@ pub fn setValue(self: *DOMTokenList, value: []const u8, page: *Page) !void {
     try self._element.setAttribute(self._attribute_name, value, page);
 }
 
-pub fn iterator(self: *const DOMTokenList, page: *Page) !*Iterator {
-    return Iterator.init(.{ .list = self }, page);
+pub fn keys(self: *DOMTokenList, page: *Page) !*KeyIterator {
+    return .init(.{ .list = self }, page);
 }
 
-pub const Iterator = GenericIterator(struct {
-    index: usize = 0,
-    list: *const DOMTokenList,
+pub fn values(self: *DOMTokenList, page: *Page) !*ValueIterator {
+    return .init(.{ .list = self }, page);
+}
 
-    // TODO: the underlying list.iten is very inefficient!
-    pub fn next(self: *@This(), page: *Page) !?[]const u8 {
-        const index = self.index;
-        self.index = index + 1;
-        return self.list.item(index, page);
+pub fn entries(self: *DOMTokenList, page: *Page) !*EntryIterator {
+    return .init(.{ .list = self }, page);
+}
+
+pub fn forEach(self: *DOMTokenList, cb_: js.Function, js_this_: ?js.Object, page: *Page) !void {
+    const cb = if (js_this_) |js_this| try cb_.withThis(js_this) else cb_;
+
+    const allocator = page.call_arena;
+
+    var i: i32 = 0;
+    var seen: std.StringArrayHashMapUnmanaged(void) = .empty;
+
+    var it = std.mem.tokenizeAny(u8, self.getValue(), WHITESPACE);
+    while (it.next()) |token| {
+        const gop = try seen.getOrPut(allocator, token);
+        if (gop.found_existing) {
+            continue;
+        }
+        var result: js.Function.Result = undefined;
+        cb.tryCall(void, .{ token, i, self }, &result) catch {
+            log.debug(.js, "forEach callback", .{ .err = result.exception, .stack = result.stack, .source = "DOMTokenList" });
+            return;
+        };
+        i += 1;
     }
-}, null);
+}
 
 fn getTokens(self: *const DOMTokenList, page: *Page) !Lookup {
     const value = self.getValue();
@@ -205,6 +229,20 @@ fn updateAttribute(self: *DOMTokenList, tokens: Lookup, page: *Page) !void {
     try self._element.setAttribute(self._attribute_name, joined, page);
 }
 
+const Iterator = struct {
+    index: u32 = 0,
+    list: *DOMTokenList,
+
+    const Entry = struct { u32, []const u8 };
+
+    pub fn next(self: *Iterator, page: *Page) !?Entry {
+        const index = self.index;
+        const node = try self.list.item(index, page) orelse return null;
+        self.index = index + 1;
+        return .{ index, node };
+    }
+};
+
 pub const JsApi = struct {
     pub const bridge = js.Bridge(DOMTokenList);
 
@@ -229,6 +267,11 @@ pub const JsApi = struct {
     pub const toggle = bridge.function(DOMTokenList.toggle, .{ .dom_exception = true });
     pub const replace = bridge.function(DOMTokenList.replace, .{ .dom_exception = true });
     pub const value = bridge.accessor(DOMTokenList.getValue, DOMTokenList.setValue, .{});
-    pub const symbol_iterator = bridge.iterator(DOMTokenList.iterator, .{});
+    pub const toString = bridge.function(DOMTokenList.getValue, .{});
+    pub const keys = bridge.function(DOMTokenList.keys, .{});
+    pub const values = bridge.function(DOMTokenList.values, .{});
+    pub const entries = bridge.function(DOMTokenList.entries, .{});
+    pub const symbol_iterator = bridge.iterator(DOMTokenList.values, .{});
+    pub const forEach = bridge.function(DOMTokenList.forEach, .{});
     pub const @"[]" = bridge.indexed(DOMTokenList.item, .{ .null_as_undefined = true });
 };
diff --git a/src/browser/webapi/collections/iterator.zig b/src/browser/webapi/collections/iterator.zig
index 2c16ed85..0c063e84 100644
--- a/src/browser/webapi/collections/iterator.zig
+++ b/src/browser/webapi/collections/iterator.zig
@@ -21,11 +21,6 @@ const js = @import("../../js/js.zig");
 const Page = @import("../../Page.zig");
 
 pub fn Entry(comptime Inner: type, comptime field: ?[]const u8) type {
-    // const InnerStruct = switch (@typeInfo(Inner)) {
-    //     .@"struct" => Inner,
-    //     .pointer => |ptr| ptr.child,
-    //     else => @compileError("invalid iterator type"),
-    // };
     const InnerStruct = Inner;
     const R = reflect(InnerStruct, field);
 
@@ -68,7 +63,7 @@ pub fn Entry(comptime Inner: type, comptime field: ?[]const u8) type {
                 pub var class_id: bridge.ClassId = undefined;
             };
 
-            pub const next = bridge.function(Self.next, .{});
+            pub const next = bridge.function(Self.next, .{ .null_as_undefined = true });
             pub const symbol_iterator = bridge.iterator(Self, .{});
         };
     };