forked from LeenkxTeam/Kmake
35 lines
1.3 KiB
HTML
35 lines
1.3 KiB
HTML
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<!DOCTYPE html>
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<title>Synthetic events are always cancelable by default</title>
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<link rel="help" href="https://dom.spec.whatwg.org/#dictdef-eventinit">
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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>
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const eventsMap = {
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wheel: 'WheelEvent',
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mousewheel: 'WheelEvent',
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touchstart: 'TouchEvent',
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touchmove: 'TouchEvent',
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touchend: 'TouchEvent',
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touchcancel: 'TouchEvent',
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}
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function isCancelable(eventName, interfaceName) {
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test(() => {
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assert_implements(interfaceName in self, `${interfaceName} should be supported`);
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let defaultPrevented = null;
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addEventListener(eventName, event => {
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event.preventDefault();
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defaultPrevented = event.defaultPrevented;
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});
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const event = new self[interfaceName](eventName);
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assert_false(event.cancelable, 'cancelable');
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const dispatchEventReturnValue = dispatchEvent(event);
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assert_false(defaultPrevented, 'defaultPrevented');
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assert_true(dispatchEventReturnValue, 'dispatchEvent() return value');
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}, `Synthetic ${eventName} event with interface ${interfaceName} is not cancelable`);
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}
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for (const eventName in eventsMap) {
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isCancelable(eventName, eventsMap[eventName]);
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isCancelable(eventName, 'Event');
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}
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</script>
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