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56 lines
1.4 KiB
HTML
56 lines
1.4 KiB
HTML
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<!DOCTYPE html>
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<meta charset="utf-8">
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<title>Window extends EventTarget</title>
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<link rel="help" href="https://github.com/jsdom/jsdom/issues/2830">
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<script src="../resources/testharness.js"></script>
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<script src="../resources/testharnessreport.js"></script>
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<body>
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<script>
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"use strict";
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test(() => {
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assert_equals(window.addEventListener, EventTarget.prototype.addEventListener);
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assert_equals(window.removeEventListener, EventTarget.prototype.removeEventListener);
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assert_equals(window.dispatchEvent, EventTarget.prototype.dispatchEvent);
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}, "EventTarget methods on Window instances are inherited from the EventTarget prototype");
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test(() => {
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const kCustom = "custom-event";
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const customEvent = new CustomEvent(kCustom, {
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bubbles: true
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});
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let target;
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window.addEventListener.call(document.body, kCustom, function () {
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target = this;
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});
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document.body.dispatchEvent(customEvent);
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assert_equals(target, document.body);
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}, "window.addEventListener respects custom `this`");
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test(() => {
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const kCustom = "custom-event";
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const customEvent = new CustomEvent(kCustom, {
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bubbles: true
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});
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let target;
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window.addEventListener.call(null, kCustom, function () {
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target = this;
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});
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document.body.dispatchEvent(customEvent);
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assert_equals(target, window);
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}, "window.addEventListener treats nullish `this` as `window`");
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</script>
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