[Webkit-unassigned] [Bug 231578] New: Caret positioning in an empty contenteditable with an :after pseudo-element is misaligned when a line-height is specified

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231578

            Bug ID: 231578
           Summary: Caret positioning in an empty contenteditable with an
                    :after pseudo-element is misaligned when a line-height
                    is specified
           Product: WebKit
           Version: Safari 14
          Hardware: Mac (Intel)
                OS: macOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: scalesjordan at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 440928

  --> https://bugs.webkit.org/attachment.cgi?id=440928&action=review

A minimum repro of the bug

An empty <div contenteditable> with an :after pseudo-element does not place the caret in the correct place when a line-height is specified. Upon typing in the contenteditable, the caret is aligned correctly. This bug is not present when line-height is set to normal.

A minimum repro has been attached.

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1 Safari/605.1.15

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