88 lines
3 KiB
HTML
88 lines
3 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>Element Timing: background image affecting multiple elements</title>
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<body>
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<style>
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body {
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margin: 0;
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}
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.my_div {
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background-image: url('resources/square100.png');
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}
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#div1 {
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width: 100px;
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height: 100px;
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}
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#div2 {
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width: 200px;
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height: 100px;
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}
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</style>
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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/element-timing-helpers.js"></script>
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<script>
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async_test(function (t) {
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assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
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let beforeRender = performance.now();
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let numObservedElements = 0;
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let observedDiv1 = false;
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let observedDiv2Img = false;
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let observedDiv2Txt = false;
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const pathname = window.location.origin + '/element-timing/resources/square100.png';
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const observer = new PerformanceObserver(
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t.step_func(function(entryList) {
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entryList.getEntries().forEach(entry => {
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numObservedElements++;
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if (entry.id == 'div1') {
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observedDiv1 = true;
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checkElement(entry, pathname, 'et1', 'div1', beforeRender,
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document.getElementById('div1'));
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// Div is in the top left corner.
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checkRect(entry, [0, 100, 0, 100]);
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checkNaturalSize(entry, 100, 100);
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}
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else if (entry.id == 'div2') {
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// Check image entry.
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if (entry.name !== 'text-paint') {
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observedDiv2Img = true;
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checkElement(entry, pathname, 'et2', 'div2', beforeRender,
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document.getElementById('div2'));
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// Div is below div1, on the left.
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checkRect(entry, [0, 200, 100, 200]);
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checkNaturalSize(entry, 100, 100);
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}
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// Check the text entry.
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else {
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observedDiv2Txt = true;
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checkTextElement(entry, 'et2', 'div2', beforeRender,
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document.getElementById('div2'));
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assert_greater_than_equal(entry.intersectionRect.right - entry.intersectionRect.left, 50);
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assert_greater_than_equal(entry.intersectionRect.bottom - entry.intersectionRect.top, 10);
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}
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}
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else {
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assert_unreached("Should not observe other elements!");
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}
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if (numObservedElements === 3) {
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assert_true(observedDiv1);
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assert_true(observedDiv2Img);
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assert_true(observedDiv2Txt);
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t.done();
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}
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});
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})
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);
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observer.observe({entryTypes: ['element']});
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}, 'Background image affecting various elements is observed.');
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</script>
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<div id="div1" class="my_div" elementtiming="et1">
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<img width=50 height=50 src='resources/circle.svg'/>
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</div>
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<div width=200 height=100 id="div2" class="my_div" elementtiming="et2">
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Sample text inside div.
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</div>
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<div id="div3">
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I am a div that should not be observed!
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</div>
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</body>
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