23 lines
832 B
HTML
23 lines
832 B
HTML
<!DOCTYPE html>
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<link rel=author href="mailto:jarhar@chromium.org">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<body>
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<script>
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test(() => {
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const host = document.createElement('div');
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document.body.appendChild(host);
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const shadowRoot = host.attachShadow({mode: 'open', delegatesFocus: true});
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const shadowInput = document.createElement('input');
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shadowRoot.appendChild(shadowInput);
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host.focus();
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assert_equals(document.activeElement, host, 'The shadow host should be focused.');
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host.setAttribute('tabindex', '0');
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assert_equals(document.activeElement, host, 'The shadow host should remain focused after changing tabindex.');
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}, 'Setting tabindex on the shadow host of a focused element with delegatesFocus should not change focus.');
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</script>
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