Bug 263621
| Summary: | Log to the console when preventDefault() is called inside a passive event listener | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | Abrar Rahman Protyasha <a_protyasha> |
| Component: | DOM | Assignee: | Abrar Rahman Protyasha <a_protyasha> |
| Status: | NEW | ||
| Severity: | Normal | CC: | a_protyasha, karlcow, webkit-bug-importer |
| Priority: | P2 | Keywords: | BrowserCompat, InRadar |
| Version: | WebKit Nightly Build | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
Abrar Rahman Protyasha
The DOM standard makes this recommendation:
```
There are scenarios where invoking preventDefault() has no effect. User agents are encouraged to log the precise cause in a developer console, to aid debugging.
```
We should respect that for the case when preventDefault() is called on an event inside a passive event listener, since that has no effect and might not be what the developer is expecting.
| Attachments | ||
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| Add attachment proposed patch, testcase, etc. |
Radar WebKit Bug Importer
<rdar://problem/117440707>
Abrar Rahman Protyasha
(In reply to Abrar Rahman Protyasha from comment #0)
> The DOM standard makes this recommendation:
Recommendation is here:
https://dom.spec.whatwg.org/#set-the-canceled-flag:~:text=There%20are%20scenarios%20where%20invoking%20preventDefault()%20has%20no%20effect.%20User%20agents%20are%20encouraged%20to%20log%20the%20precise%20cause%20in%20a%20developer%20console%2C%20to%20aid%20debugging.
Abrar Rahman Protyasha
This change should also bring us to parity with behavior in Blink/Gecko.
Abrar Rahman Protyasha
Pull request: https://github.com/WebKit/WebKit/pull/19514