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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>Hit-testing on pseudo elements of inert nodes</title>
<link rel="author" title="Tim Nguyen" href="">
<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>
<script src="/resources/testdriver-actions.js"></script>
#target::before {
content: "";
width: 50px;
height: 50px;
background-color: green;
display: inline-block;
#target:active::before {
background-color: red;
<p>Manual test: hover the green square, pass if it does not turn red.</p>
<div id="target" inert></div>
const events = [
"mousedown", "mouseenter", "mousemove", "mouseover",
"pointerdown", "pointerenter", "pointermove", "pointerover",
async function mouseDownAndGetEvents(test) {
const receivedEvents = [];
for (let event of events) {
target.addEventListener(event, () => {
}, { once: true, capture: true });
let targetRect = target.getBoundingClientRect();
await new test_driver.Actions()
.pointerMove(targetRect.x + 1, targetRect.y + 1, { origin: "viewport" })
test.add_cleanup(() =>;
// Exact order of events is not interoperable.
return receivedEvents;
promise_test(async function() {
const receivedEvents = await mouseDownAndGetEvents(this);
assert_array_equals(receivedEvents, [], "target got no event");
assert_false(target.matches(":active"), "target is not active");
assert_false(target.matches(":hover"), "target is not hovered");
assert_equals(getComputedStyle(target, "::before").backgroundColor, "rgb(0, 128, 0)", "#target::before has no hover style");
}, "Hit-testing cannot reach pseudo elements of inert nodes");
promise_test(async function() {
target.inert = false;
const receivedEvents = await mouseDownAndGetEvents(this);
assert_array_equals(receivedEvents, events, "target got all events");
assert_true(target.matches(":active"), "target is active");
assert_true(target.matches(":hover"), "target is hovered");
assert_equals(getComputedStyle(target, "::before").backgroundColor, "rgb(255, 0, 0)", "#target::before has hover style");
}, "Hit-testing can reach pseudo elements of non-inert nodes");