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https://github.com/servo/servo
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119 lines
2.9 KiB
HTML
119 lines
2.9 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<meta name="flags" content="dom">
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<title>CSS Test: CSSOM View MediaQueryList extends EventTarget</title>
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<link rel="help" href="https://www.w3.org/TR/cssom-view-1/#the-mediaquerylist-interface">
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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="resources/matchMedia.js"></script>
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<div id="log"></div>
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<script>
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"use strict";
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promise_test(async t => {
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const mql = await createMQL(t);
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let _event;
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mql.onchange = event => {
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_event = event;
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};
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triggerMQLEvent(mql);
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await waitForChangesReported();
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assert_equals(_event.media, mql.media);
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assert_equals(_event.matches, mql.matches);
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}, "onchange adds listener");
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promise_test(async t => {
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const mql = await createMQL(t);
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let calls = 0;
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mql.onchange = () => {
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calls++;
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};
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triggerMQLEvent(mql);
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await waitForChangesReported();
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assert_equals(calls, 1);
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mql.onchange = null;
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triggerMQLEvent(mql);
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await waitForChangesReported();
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assert_equals(calls, 1);
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}, "onchange removes listener");
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promise_test(async t => {
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const mql = await createMQL(t);
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let calls = 0;
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mql.addEventListener("change", {
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handleEvent() {
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calls++;
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},
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});
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triggerMQLEvent(mql);
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await waitForChangesReported();
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assert_equals(calls, 1);
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}, 'listeners for "change" type are called');
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promise_test(async t => {
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const mql = await createMQL(t);
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mql.addEventListener("matches", t.unreached_func("should not be called"));
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triggerMQLEvent(mql);
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await waitForChangesReported();
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}, 'listeners with different type are not called');
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promise_test(async t => {
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const mql = await createMQL(t);
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let calls = 0;
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mql.addEventListener("change", {
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handleEvent() {
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calls++;
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},
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}, {once: true});
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triggerMQLEvent(mql);
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await waitForChangesReported();
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assert_equals(calls, 1);
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triggerMQLEvent(mql);
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await waitForChangesReported();
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assert_equals(calls, 1);
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}, 'addEventListener "once" option is respected');
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promise_test(async t => {
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const mql = await createMQL(t);
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const listener = t.unreached_func("should not be called");
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mql.addEventListener("change", listener);
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mql.removeEventListener("change", listener);
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triggerMQLEvent(mql);
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await waitForChangesReported();
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}, "removeEventListener removes listener");
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test(() => {
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const mql = window.matchMedia("all");
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let receivedEvent;
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mql.addEventListener("custom", event => {
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receivedEvent = event;
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event.preventDefault();
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}, true);
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const dispatchedEvent = new CustomEvent("custom", {
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cancelable: true,
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detail: {},
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});
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const defaultAction = mql.dispatchEvent(dispatchedEvent);
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assert_equals(receivedEvent, dispatchedEvent);
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assert_false(defaultAction);
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}, "dispatchEvent works as expected");
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</script>
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