NEW296649
Make window load event dispatch asynchronous to improve WPT compatibility. 
https://bugs.webkit.org/show_bug.cgi?id=296649
Summary Make window load event dispatch asynchronous to improve WPT compatibility.
Basuke Suzuki
Reported 2025-07-29 13:56:13 PDT
Currently the event is firing synchronously. This is the reason many wpt tests using promise_test causes TIMEOUT like this code: ``` promise_test(async t => { // Wait for after the load event so that the navigation doesn't get converted // into a replace navigation. await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0)); ... ``` When the promise is created, window.onload is already fired and the promise is never resolved and TIMEOUT happens. Most of the tests under `imported/w3c/web-platform-tests/navigation-api/ordering-and-transition/ failed with TIMEOUT because of this.
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Add attachment proposed patch, testcase, etc.
Basuke Suzuki
Comment 1 2025-07-29 13:58:49 PDT
rdar://157048720
Basuke Suzuki
Comment 2 2025-07-29 14:06:17 PDT
Pull request: https://github.com/WebKit/WebKit/pull/48677
Basuke Suzuki
Comment 3 2025-08-04 07:30:04 PDT
*** Bug 277948 has been marked as a duplicate of this bug. ***
Basuke Suzuki
Comment 4 2025-08-21 12:23:28 PDT
Pull request: https://github.com/WebKit/WebKit/pull/49726
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