[Webkit-unassigned] [Bug 228992] New: Dutch IJ not selected as a single grapheme by ::first-letter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=228992

            Bug ID: 228992
           Summary: Dutch IJ not selected as a single grapheme by
                    ::first-letter
           Product: WebKit
           Version: Safari 14
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ishida at w3.org

When 'IJ' appear together at the beginning of a paragraph (eg. in "IJzertoren is een toren en vredes­monument in de West-Vlaamse stad Diksmuide."), both the first two letters should be highlighted.

Specs:
The CSS specification specifically mentions that the IJ combination should be treated as a single letter.

Tests & results:
Interactive test Dutch IJ are selected as a single grapheme by ::first-letter
https://github.com/w3c/line_paragraph_tests/issues/56

Even with the language of the text set to Dutch, neither Blink nor Webkit select IJ together.

This has been fixed, however, for Gecko. (Note that it only works if the language of the content is set to Dutch.)

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