[Webkit-unassigned] [Bug 180073] New: system-ui will cause chinese word spacing becomes larger, and font-weight:bold becomes strange

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180073

            Bug ID: 180073
           Summary: system-ui will cause chinese word spacing becomes
                    larger, and font-weight:bold becomes strange
           Product: WebKit
           Version: Safari 11
          Hardware: iPhone / iPad
                OS: iOS 11
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Text
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zhouqicf at gmail.com
                CC: mmaxfield at apple.com

Created attachment 327744

  --> https://bugs.webkit.org/attachment.cgi?id=327744&action=review

real case

"font-family: system-ui" will cause chinese word spacing becomes larger, and the "font-weight:bold" effect becomes strange.

here is a demo：https://codepen.io/zhouqicf/full/ZaMNNo

here is the code:

<code>font-family:system-ui, -apple-system, Helvetica Neue, Helvetica, sans-serif;font-weight:bold;</code>

add "PingFang SC" can fix the issue: 

<code>font-family:PingFang SC, system-ui, -apple-system, Helvetica Neue, Helvetica, sans-serif;font-weight:bold;</code>

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