Bug 267887 – WebKit is missing UA stylesheet rule to apply 'unicode-bidi: isolate' to div elements

• Component: CSS
• Status: RESOLVED DUPLICATE

[Daniel Holbert]

STR:
1. Load https://bugzilla.mozilla.org/attachment.cgi?id=9375895

EXPECTED RESULTS:
The bold part of the testcase should say:
'isolate' (as expected)

ACTUAL RESULTS:
The bold part of the testcase says:
'normal' UNEXPECTED

This testcase is just highlighting that WebKit seems to be lacking one of the UA stylesheet rules that the html spec requires here:
https://html.spec.whatwg.org/multipage/rendering.html#bidi-rendering

Quoting the rule (note 'div' is the 4th element in the selector list):
```
address, blockquote, center, div, figure, figcaption, footer, form, header, hr,
legend, listing, main, p, plaintext, pre, summary, xmp, article, aside, h1, h2,
h3, h4, h5, h6, hgroup, nav, section, search, table, caption, colgroup, col,
thead, tbody, tfoot, tr, td, th, dir, dd, dl, dt, menu, ol, ul, li, bdi, output,
slot, [dir=ltr i], [dir=rtl i], [dir=auto i] {
  unicode-bidi: isolate; 
}
```

Firefox gives the expected result.

(Chromium also gives ACTUAL RESULTS here; I filed https://bugs.chromium.org/p/chromium/issues/detail?id=1520671 on them.)

[Daniel Holbert]

I tested Safari Version 17.0 (19616.1.27.211.1) on macOS Sonoma, FWIW.

[Ahmad Saleem]

I think @noam tried to do it in another bug 65617 by importing the UA Stylesheet rule and then Darin had feedback to do it where we explicitly set 'display: block' and other remaining in block.

Darin's feedback - https://bugs.webkit.org/show_bug.cgi?id=65617#c18

I had this rule in my local build as well to look into test failures and others bit and noticed that it would take some time to fix them, so didn't did the PR but I think we should do this change.

[Darin Adler]

*** This bug has been marked as a duplicate of bug 65617 ***

[Daniel Holbert]

Thanks! Glad this is a known/agreed-upon issue.