84 lines
2.8 KiB
HTML
84 lines
2.8 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CustomElementInterface holds constructors and callbacks strongly, preventing them from being GCed if there are no other references</title>
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<link rel="help" href="https://html.spec.whatwg.org/multipage/custom-elements.html#concept-custom-element-definition-lifecycle-callbacks">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/common/gc.js"></script>
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<body>
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<div id="customElementsRoot"></div>
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<iframe id="emptyIframe" srcdoc></iframe>
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<script>
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"use strict";
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const tagNames = [...new Array(100)].map((_, i) => `x-foo${i}`);
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const delay = (t, ms) => new Promise(resolve => { t.step_timeout(resolve, ms); });
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const connectedCallbackCalls = new Set;
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const disconnectedCallbackCalls = new Set;
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const attributeChangedCallbackCalls = new Set;
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const adoptedCallbackCalls = new Set;
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for (const tagName of tagNames) {
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const constructor = class extends HTMLElement {
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connectedCallback() { connectedCallbackCalls.add(tagName); }
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disconnectedCallback() { disconnectedCallbackCalls.add(tagName); }
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attributeChangedCallback() { attributeChangedCallbackCalls.add(tagName); }
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adoptedCallback() { adoptedCallbackCalls.add(tagName); }
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};
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constructor.observedAttributes = ["foo"];
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customElements.define(tagName, constructor);
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delete constructor.prototype.connectedCallback;
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delete constructor.prototype.disconnectedCallback;
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delete constructor.prototype.attributeChangedCallback;
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delete constructor.prototype.adoptedCallback;
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}
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promise_test(async t => {
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await garbageCollect();
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assert_true(tagNames.every(tagName => typeof customElements.get(tagName) === "function"));
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}, "constructor");
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promise_test(async t => {
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await garbageCollect();
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for (const tagName of tagNames) {
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customElementsRoot.append(document.createElement(tagName));
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}
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await delay(t, 10);
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assert_equals(connectedCallbackCalls.size, tagNames.length);
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}, "connectedCallback");
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promise_test(async t => {
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await garbageCollect();
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for (const xFoo of customElementsRoot.children) {
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xFoo.setAttribute("foo", "bar");
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}
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await delay(t, 10);
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assert_equals(attributeChangedCallbackCalls.size, tagNames.length);
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}, "attributeChangedCallback");
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promise_test(async t => {
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await garbageCollect();
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customElementsRoot.innerHTML = "";
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await delay(t, 10);
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assert_equals(disconnectedCallbackCalls.size, tagNames.length);
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}, "disconnectedCallback");
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promise_test(async t => {
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await garbageCollect();
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for (const tagName of tagNames) {
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emptyIframe.contentDocument.adoptNode(document.createElement(tagName));
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}
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await delay(t, 10);
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assert_equals(adoptedCallbackCalls.size, tagNames.length);
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}, "adoptedCallback");
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</script>
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