wpt/css/css-fonts/font-feature-values-map-live.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<title>CSS Fonts Test: CSSFontFeatureValuesMap is live and reflect changes</title>
<link rel="help" href="https://drafts.csswg.org/css-fonts/#cssfontfeaturevaluesmap">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  @font-feature-values MyFamily {
    @annotation { black-boxed: 3 }
  }
</style>
<!-- Two identical stylesheets exposes a stylesheet sharing issue in Chrome -->
<style>
  @font-feature-values MyFamily {
    @annotation { circled: 1; black-boxed: 3; }
  }
</style>
<script>
  test(() => {
    const a1 = document.styleSheets[0].cssRules[0].annotation;
    a1.set("black-boxed", 42);
    const a2 = document.styleSheets[0].cssRules[0].annotation;
    assert_array_equals(a1.get("black-boxed"), [42]);
    assert_array_equals(a2.get("black-boxed"), [42]);
  }, "Two retreived maps for CSSFontFeatureValuesRule.annotation should reflect the same values");

  test(() => {
    assert_array_equals(document.styleSheets[1].cssRules[0].annotation.get("black-boxed"), [3]);
  }, "The second stylesheet should not be affected by modifications in the first");

</script>