51 lines
No EOL
1.4 KiB
HTML
51 lines
No EOL
1.4 KiB
HTML
<!DOCTYPE html>
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<title>Custom Functions: ShadowDOM (cache pitfall)</title>
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<link rel="help" href="https://drafts.csswg.org/css-mixins-1/#using-custom-functions">
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<link rel="help" href="https://drafts.csswg.org/css-scoping-1/#css-tree-scoped-reference">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/utils.js"></script>
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<style>
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@function --a() { result: 42px; }
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</style>
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<!-- Should reach --a() defined inside Shadow. -->
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<div id=host1>
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<template shadowrootmode=open>
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<style>
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@function --a() {
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result: 10px;
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}
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div {
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width: --a();
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}
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</style>
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<div id=target></div>
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</template>
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</div>
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<!--
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Should reach --a() defined at document level. Except for tree-scopes,
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the matched rules look identical for #host1 and #host2; we must not
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hit a cache and cause the same result for both.
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-->
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<div id=host2>
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<template shadowrootmode=open>
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<style>
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div {
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width: --a();
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}
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</style>
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<div id=target></div>
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</template>
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</div>
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<script>
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test(() => {
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let cs1 = getComputedStyle(host1.shadowRoot.querySelector('#target'));
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let cs2 = getComputedStyle(host2.shadowRoot.querySelector('#target'));
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assert_equals(cs1.width, '10px');
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assert_equals(cs2.width, '42px');
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}, 'Tree scope is respected for otherwise identical styles');
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</script> |