Bug 180465

Summary: change event is dispatched when .files property is set at <input type="file"> element
Product: WebKit Reporter: guest271314
Component: FormsAssignee: Chris Dumez <cdumez>
Status: RESOLVED FIXED    
Severity: Normal CC: achristensen, cdumez, changseok, darin, esprehn+autocc, ews-watchlist, gyuyoung.kim, kondapallykalyan, mifenton, rniwa, sam, simon.fraser, tristan.fraipont, webkit-bug-importer, wenson_hsieh
Priority: P2 Keywords: BrowserCompat, InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
change event dispatched when .files set at <input type="file">
none
Patch none

guest271314
Reported 2017-12-05 22:56:04 PST
Created attachment 328552 [details] change event dispatched when .files set at <input type="file"> Programmatically set .files property of <input type="file"> element to a FileList object Expected behaviour: change event should not be dispatched to the element Actual result: change event is dispatched to the element Browser: Chromium 62 See https://bugs.chromium.org/p/chromium/issues/detail?id=792336, https://github.com/whatwg/html/issues/3269
Attachments
change event dispatched when .files set at <input type="file"> (1.86 KB, application/javascript)
2017-12-05 22:56 PST, guest271314 		no flags
Details
Patch (10.42 KB, patch)
2021-08-24 13:29 PDT, Chris Dumez 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2019-06-16 21:17:30 PDT
Does this reproduce in Safari? Chrome bugs should be filed in the Chromium bug tracker.
Kaiido
Comment 2 2021-08-04 18:34:48 PDT
This is a Safari only bug, still reproducible in current TP Release 128 (Safari 15.0, WebKit 16612.1.22.11.3) Here is a fiddle reproducing the issue: https://jsfiddle.net/34sxmbqc/ Specs (https://html.spec.whatwg.org/multipage/input.html#dom-input-files) do not ask to fire an event here, since the change has been caused by script manipulation. The particularly alarming point is that this event even has the `isTrusted` property set to `true`.
Chris Dumez
Comment 3 2021-08-24 13:29:14 PDT
Created attachment 436325 [details] Patch
EWS
Comment 4 2021-08-24 16:32:05 PDT
Committed r281527 (240899@main): <https://commits.webkit.org/240899@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 436325 [details].
Radar WebKit Bug Importer
Comment 5 2021-08-24 16:33:27 PDT
<rdar://problem/82315840>
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