[Webkit-unassigned] [Bug 272339] New: css zoom doesn't zoom font-size with -webkit-text-size-adjust: none

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Apr 8 10:25:03 PDT 2024


            Bug ID: 272339
           Summary: css zoom doesn't zoom font-size with
                    -webkit-text-size-adjust: none
           Product: WebKit
           Version: Safari 17
          Hardware: iPhone / iPad
                OS: iOS 17
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mikelehen at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 470816

  --> https://bugs.webkit.org/attachment.cgi?id=470816&action=review

HTML test case demonstrating bug

See attached test case. Live repro here: https://mikelehen.github.io/public-web/tmp/safari-zoom.html

With -webkit-text-size-adjust: none; the CSS zoom setting seems to be disregarded when there's an explicit font-size within the zoomed element.

1. Works in Chrome and Desktop Safari, but not iOS Safari.
2. The font sizes I'm using should be big enough to avoid minimum font sizes, and the bug repros with zoom <1 or >1.

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