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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /focus/cross-origin-ancestor-activeelement-after-child-lose-focus.sub.html - WPT Dashboard Interop Dashboard
<!doctype html>
<head>
<meta charset=utf-8>
<title>Ancestor's activeElement should be cleared when child loses focus</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
</head>
<body>
<input placeholder="input in top level"/>
<iframe></iframe>
<script>
const outerIFrame = document.querySelector('iframe');
setup({ explicit_done: true });
function runTest() {
test(() => {
assert_equals(outerIFrame.contentDocument.activeElement, outerIFrame.contentDocument.body,
"Initially, the activeElement of the outer iframe should be <body>");
const innerIFrame = outerIFrame.contentDocument.createElement("iframe");
window.onmessage = function(event) {
if (event.data != "ready") {
return;
}
// We receive an message when the innerIFrame is ready and its input is focused.
// outerIframe is the ancestor of inner iframe, so the activeElement of
// it should be the inner iframe.
assert_equals(outerIFrame.contentDocument.activeElement, innerIFrame,
"The activeElement of the outer iframe should be the inner iframe");
// Now we focus the input in the top level
document.querySelector("input").focus();
// Wait for a bit to let whatever the code that might change the focus to run
window.requestAnimationFrame(function() {
window.requestAnimationFrame(function() {
window.requestAnimationFrame(function() {
// Since inner iframe lost its focus, the activeElement of outer iframe
// should be cleared as well, hence <body> should be focused.
assert_equals(outerIFrame.contentDocument.activeElement, outerIFrame.contentDocument.body,
"The activeElement of the outer iframe should be reverted back to <body>");
assert_equals(document.activeElement, document.querySelector("input"),
"The activeElement of the top-level document should the input");
done();
})
});
});
}
// Opens the cross-origin inner iframe with a page that contains an input element.
innerIFrame.src = "http://{{domains[www1]}}:{{ports[http][0]}}/focus/support/cross-origin-ancestor-activeelement-after-child-lose-focus-helper.html";
outerIFrame.contentDocument.body.appendChild(innerIFrame);
});
}
window.onload = function() {
runTest();
}
</script>
</body>