[Webkit-unassigned] [Bug 174018] New: Drop beforeload event

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Jun 30 01:49:45 PDT 2017


            Bug ID: 174018
           Summary: Drop beforeload event
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: utatane.tea at gmail.com
                CC: cdumez at apple.com

I wonder if we can drop "beforeload" event support.
This is already dropped in Chrome long ago. (2014) https://bugs.chromium.org/p/chromium/issues/detail?id=333318
And Firefox does not support it. It has a bug attempting to support "beforeload" event. But it seems rejected. https://bugzilla.mozilla.org/show_bug.cgi?id=715695

And according to the Firefox's bug, "beforeload" event is introduced to be used by ad-blocking user extensions. However, we already have more efficient mechanism to implement ad-block.

Furthermore, "beforeload" event frequently causes some troubles because it can insert JS handler execution.

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