[Webkit-unassigned] [Bug 155319] New: "Font-Variant-East-Asian: proportional-width" does not work while being defined within @font-face block

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=155319

            Bug ID: 155319
           Summary: "Font-Variant-East-Asian: proportional-width" does not
                    work while being defined within @font-face block
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: OS X 10.11
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: shikisuen at outlook.com

Created attachment 273601
  --> https://bugs.webkit.org/attachment.cgi?id=273601&action=review
[Demonstration] EAFontVariantWithinFontFace.html

// Please drop and lock bug 155316 and its related radar issue since its initial bug reporter made false assumptions to my idea before my confirmation on Twitter: https://twitter.com/ShikiSuen/status/708026601452122112

1. This bug is NOT related to specific fonts, but ALL fonts support "Font-Variant-East-Asian: proportional-width". I tested this webpage with Source Han Sans, it shows the same.

2. In the 2nd case of my attached demonstration page, it uses Font-Variant-East-Asian: proportional-width and works well. HOWEVER, in the 1st case of my attached demonstration page, "Font-Variant-East-Asian: proportional-width" is defined within @font-face and it couldn't work.

P.S.: The 3rd case using palt is just the only way I could use to make both Kana and CJK Punctuation marks proportional in both Safari and Chrome, while Font-Variant-East-Asian: proportional-width couldn't be effective in Chrome.

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