[Webkit-unassigned] [Bug 200339] New: font-feature-settings (salt) not supported in CSS animations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200339

            Bug ID: 200339
           Summary: font-feature-settings (salt) not supported in CSS
                    animations
           Product: WebKit
           Version: Safari 12
          Hardware: All
                OS: macOS 10.14
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: alex at wysiwyg.de

cycling through several Stylistic Alternatives works in a single style assignment, but not assigned through animation @keyframes or steps.

.anim {
        font-family: 'julogo';
        font-feature-settings: "salt";
        animation-name: juTypeanim; 
        animation-duration: 1.5s;
        animation-iteration-count: infinite;
        animation-timing-function: linear; 
}

@keyframes juTypeanim {
        10%     { font-feature-settings: "ss01"; }
        20%     { font-feature-settings: "ss02"; }
        30%     { font-feature-settings: "ss03"; }
        40%     { font-feature-settings: "ss04"; }
        50%     { font-feature-settings: "ss05"; }
        60%     { font-feature-settings: "ss06"; }
        70%     { font-feature-settings: "ss07"; }
        80%     { font-feature-settings: "ss08"; }
}

in this case 8 glyph alternatives are swapped out. 
Chrome 75x mac OS and Firefox 68 support it completely.

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