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Add support for the shadow root clonable flag #44216

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merged 1 commit into from
Jan 27, 2024
Merged

Add support for the shadow root clonable flag #44216

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10 changes: 0 additions & 10 deletions shadow-dom/declarative/clonable.window.js
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49 changes: 49 additions & 0 deletions shadow-dom/shadow-root-clonable.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<title>Shadow root clonable flag</title>
<link rel='author' href='mailto:krosylight@mozilla.com'>
<link rel='author' href='mailto:masonf@chromium.org'>
<link rel='help' href='https://dom.spec.whatwg.org/#shadowroot-clonable'>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>

<body>
<script>
test(() => {
const div = document.createElement("div");
const root = div.attachShadow({ mode: "open", clonable: true });
root.appendChild(document.createElement("input"));
assert_true(root.clonable, "clonable attribute");

const clone = div.cloneNode(true);
const clonedRoot = clone.shadowRoot;
assert_true(clonedRoot.clonable, "clone gets the same clonable state");
assert_equals(clonedRoot.children.length, 1, "children count");
assert_equals(clonedRoot.children[0].localName, "input", "children content");
}, "attachShadow with clonable: true");

for (const clonable of [false, undefined]) {
test(() => {
const div = document.createElement("div");
const root = div.attachShadow({ mode: "open", clonable });
root.appendChild(document.createElement("input"));
assert_false(root.clonable, "clonable attribute");

const clone = div.cloneNode(true);
assert_true(!clone.shadowRoot, "shadow should not be cloned");
}, `attachShadow with clonable: ${clonable}`);
}

test(() => {
const div = document.createElement("div");
div.setHTMLUnsafe('<div><template shadowrootmode=open><input></template></div>');
const root = div.firstElementChild.shadowRoot;
assert_true(!!root);
assert_true(root.clonable, "clonable is automatically true for declarative shadow root");

const clone = div.cloneNode(true);
const clonedRoot = clone.firstElementChild.shadowRoot;
assert_true(!!clonedRoot);
assert_equals(clonedRoot.children.length, 1, "children count");
assert_equals(clonedRoot.children[0].localName, "input", "children content");
}, "declarative shadow roots get clonable: true automatically");
</script>