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Test Info: Warnings
- This test has a WPT meta file that expects 2 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /css/selectors/invalidation/part-lang.html - WPT Dashboard Interop Dashboard
<!doctype html>
<title>::part():lang() invalidation</title>
<link rel="author" title="Keith Cirkel" href="mailto:wpt@keithcirkel.co.uk" />
<style>
my-element::part(inner) {
background-color: #ff0000;
}
my-element::part(inner):lang(en) {
background-color: #00ffff;
}
my-element::part(inner):lang(en-GB) {
background-color: #00ff00;
}
my-element::part(inner):lang(fr) {
background-color: #0000ff;
}
</style>
<body>
<my-element id="subject" lang="en"></my-element>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
const RED = "rgb(255, 0, 0)";
const GREEN = "rgb(0, 255, 0)";
const BLUE = "rgb(0, 0, 255)";
const AQUA = "rgb(0, 255, 255)";
customElements.define(
"my-element",
class MyElement extends HTMLElement {
connectedCallback() {
this.attachShadow({
mode: "open",
}).innerHTML = `<div part="inner">Test</div>`;
this.elementInternals = this.attachInternals();
}
get inner() {
return this.shadowRoot.querySelector("[part=inner]");
}
},
);
test((t) => {
t.add_cleanup(() => {
subject.inner.removeAttribute("lang");
});
assert_equals(getComputedStyle(subject.inner).backgroundColor, AQUA);
subject.inner.lang = "en-GB";
assert_equals(getComputedStyle(subject.inner).backgroundColor, GREEN);
subject.inner.lang = "fr";
assert_equals(getComputedStyle(subject.inner).backgroundColor, BLUE);
subject.inner.lang = "en";
assert_equals(getComputedStyle(subject.inner).backgroundColor, AQUA);
}, "::part():lang() invalidation");
test((t) => {
t.add_cleanup(() => {
subject.inner.removeAttribute("lang");
});
assert_equals(getComputedStyle(subject.inner).backgroundColor, AQUA);
subject.inner.setAttribute("lang", "en-GB");
assert_equals(getComputedStyle(subject.inner).backgroundColor, GREEN);
subject.inner.setAttribute("lang", "en");
assert_equals(getComputedStyle(subject.inner).backgroundColor, AQUA);
subject.inner.setAttribute("lang", "fr");
assert_equals(getComputedStyle(subject.inner).backgroundColor, BLUE);
subject.inner.removeAttribute("lang");
assert_equals(getComputedStyle(subject.inner).backgroundColor, AQUA);
}, "::part():lang() invalidation from setAttribute");
</script>
</body>