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<!doctype html>
<title>Shadow parts are invalidated correctly when only a pseudo-class state to the right of the part matches</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<style>
div {
width: 100px;
height: 100px;
}
#host::part(p) {
background-color: red;
}
#host::part(p):hover {
background-color: lime;
}
</style>
<div id="host"></div>
<div id="random-element-to-force-change"></div>
<script>
SimpleTest.waitForExplicitFinish();
let host = document.getElementById("host");
host.attachShadow({ mode: "open" }).innerHTML = `
<style>
div {
width: 100px;
height: 100px;
}
</style>
<div part=p></div>
`;
let part = host.shadowRoot.querySelector("div");
let other = document.getElementById("random-element-to-force-change");
SimpleTest.waitForFocus(function() {
synthesizeMouseAtCenter(other, {type: "mousemove"});
is(
getComputedStyle(part).backgroundColor,
"rgb(255, 0, 0)",
"Part is red"
);
synthesizeMouseAtCenter(part, {type: "mousemove"});
is(
getComputedStyle(part).backgroundColor,
"rgb(0, 255, 0)",
"Part is lime"
);
SimpleTest.finish();
});
</script>