Bug 261936 – REGRESSION (iOS 17): The textarea element URL encodes pasteboard data

• Status: RESOLVED
• Resolution: FIXED
• Component: Forms

[Ben Ubois]

The textarea element has an unexpected behavior where it URL encodes the data it sends to the pasteboard when a certain pattern is entered.

Any string followed by a colon, will result in the contents getting URL encoded when copied.

Video example: https://www.dropbox.com/scl/fi/scf8jxjyj6egg3r63wnz4/textarea.mov?rlkey=6qc0fcxa41en9xxvv7df3v382&dl=0

Steps:

1. Type the following string into a textarea: Hello:<
2. Copy the contents of the textarea
3. Paste the result somewhere

Expected:

The string Hello:< should be pasted

Actual:

The string hello:%3C is pasted

[Alexey Proskuryakov]

I can reproduce this on iOS, but not on macOS. Quite weird indeed.

[Ben Ubois]

It looks like this does not just affect textarea. Any text that matches this pattern gets URL encoded when copied in iOS Safari 17.

[Alexey Proskuryakov]

Do you happen to know if this is new in iOS 17, and didn't affect earlier version?

[Ben Ubois]

Created attachment 467854 [details]
iOS 16.4 vs iOS 17.0 result

It appears to be new as of iOS 17. I was able to test on 16.4 as well (the most recent of the simulator versions available) and the same issue was not present. 

In the attachment you can see the difference between 16.4 and 17 when copying and pasting from a <p> into a <textarea>. 

It appears that iOS 17 is down casing the pasted string as well.

[Radar WebKit Bug Importer]

<rdar://problem/116056298>

[Richard Robinson]

Pull request: https://github.com/WebKit/WebKit/pull/18902

[EWS]

Committed 269178@main (a2225304ef16): <https://commits.webkit.org/269178@main>

Reviewed commits have been landed. Closing PR #18902 and removing active labels.

[Alexey Proskuryakov]

*** Bug 264867 has been marked as a duplicate of this bug. ***

[Alexey Proskuryakov]

This should be working correctly in current iOS 17.2 beta. Please comment if it does not.