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Add tests for focus()/blur() on MathML elements. #59817

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Merged
fred-wang merged 1 commit into from
May 13, 2026
Merged

Add tests for focus()/blur() on MathML elements. #59817

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48 changes: 48 additions & 0 deletions mathml/relations/html5-tree/focus-blur-001.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<title>focus()/blur()</title>
<script src="/mathml/support/mathml-fragments.js"></script>
<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>
<style>
annotation, annotation-xml { display: initial; }
mphantom { visibility: visible; }
.element { background: rgb(0, 0, 255); padding: 50px; }
.element:focus { background-color: rgb(0, 255, 0); }
</style>
<div id="log"></div>
<input id="input"></input>
<div id="container"><math class="element" tabindex="1"></math></div>
<script>
for (tag in MathMLFragments) {
container.insertAdjacentHTML("beforeend", `<math>${MathMLFragments[tag]}</math>`);
let element = FragmentHelper.element(container.lastElementChild);
element.tabIndex = 1;
}
Array.from(document.getElementsByClassName("element")).forEach(element => {
promise_test(async t => {
t.add_cleanup(_ => window.scrollTo(0, 0));

await new Promise(resolve => {
input.addEventListener("focus", resolve, {once: true});
input.focus({preventScroll: true});
});
assert_equals(document.activeElement, input, "input initally selected");

await new Promise(resolve => {
element.addEventListener("focus", resolve, {once: true});
element.focus();
});
assert_equals(document.activeElement, element, "element selected after focus()");
assert_equals(getComputedStyle(element).backgroundColor, "rgb(0, 255, 0)", ":focus applied on element after focus()");

await new Promise(resolve => {
element.addEventListener("blur", resolve, {once: true});
element.blur();
});
assert_equals(document.activeElement, document.body, "element unselected after blur()");
assert_equals(getComputedStyle(element).backgroundColor, "rgb(0, 0, 255)", ":focus not applied on element after blur()");
}, `focus()/blur() works on the ${element.tagName} element.`);
});
</script>
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