19 lines
854 B
HTML
19 lines
854 B
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>focus move tests caused by a call of Selection.addRange()</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div id="host"></div>
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<script>
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let host = document.getElementById("host");
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let shadow = host.attachShadow({ mode: "open", delegatesFocus: true });
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shadow.innerHTML = `<button>Focusable</button>`;
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test(function() {
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assert_true(SpecialPowers.Services.focus.elementIsFocusable(host, 0), "host is focusable");
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host.focus();
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assert_equals(document.activeElement, host, "Host is focused");
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assert_equals(shadow.activeElement, shadow.querySelector("button"), "Button is focused");
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assert_true(SpecialPowers.Services.focus.elementIsFocusable(host, 0), "host is still focusable");
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}, "isElementFocusable with delegateFocus");
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</script>
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