Bug 278919 – Web Inspector: $event ReferenceError in Safari extension event listeners

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector

[Jeff Johnson]

Created attachment 472371 [details]
Sample Safari web extension Xcode project

According to the Console Command Line API, $event is equal to the current DOM event while JavaScript execution is paused inside a DOM event listener. https://webkit.org/web-inspector/console-command-line-api/ However, $event does not work in Safari extension DOM event listeners.

Steps to reproduce:
1) Download, unzip, open, build, and run the attached sample Safari web extension Xcode project EventBug.
2) Enable EventBug in Safari.
3) Open the attached sample HTML in Safari.
4) Open the web inspector.
5) Create a mousedown event breakpoint.
6) Click in the web page.
7) In the content.js mousedown event listener, enter $event in the console.

Expected results: MouseEvent

Actual results: ReferenceError: Can't find variable: $event

[Jeff Johnson]

Created attachment 472372 [details]
Sample HTML to reproduce the bug

[Jeff Johnson]

Created attachment 472377 [details]
Screen recording of the bug

[Devin Rousso]

Pull request: https://github.com/WebKit/WebKit/pull/32976

[EWS]

Committed 283181@main (bec6d22a9343): <https://commits.webkit.org/283181@main>

Reviewed commits have been landed. Closing PR #32976 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/135311271>