46 lines
1.9 KiB
HTML
46 lines
1.9 KiB
HTML
<!DOCTYPE html>
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<html class="reftest-wait reftest-snapshot-all reftest-no-flush" reftest-async-scroll
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reftest-async-scroll-y="200">
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<head>
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<title>Check that the apz.disable_for_sle_pages pref behaves as expected</title>
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<script>
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// Upon load, this page invokes scrollTo() for a transparent element
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// repeatedly. It triggers scroll events, which run the scroll listener
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// below. The scroll listener updates the background-position-x of the div
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// to make the div a scroll-linked-effect. The scroll-linked effect detector
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// should then report that the document contains such an effect, which will
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// disable APZ on the page. That in turn will cause the
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// reftest-async-scroll-y to get ignored, and that's what the reftest checks
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// for.
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function start() {
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let scrollPosition = 1;
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scroller.addEventListener('scroll', function() {
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// NOTE: Changing background-position-x doesn't change rendering for
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// this element.
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document.getElementById('scroll-linked-effect').style.backgroundPositionX =
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scroller.scrollTop + "px";
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if (scrollPosition == 1) {
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setTimeout(done, 0);
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}
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scrollPosition++;
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scroller.scrollTo(0, scrollPosition);
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});
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scroller.scrollTo(0, scrollPosition);
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}
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addEventListener('load', start, false);
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function done() {
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document.documentElement.classList.remove('reftest-wait');
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}
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</script>
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</head>
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<body style="height: 5000px; background-image:url(repeatable-diagonal-gradient.png);">
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<div id="scroller" style="overflow: auto; width: 100px; height: 100px; scrollbar-width: none;">
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<div style="height: 5000px;"></div>
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</div>
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<div id="scroll-linked-effect" style="position: absolute; top: 100px; left: 100px; width: 100px; height: 100px; background-color: green"></div>
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</body>
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</html>
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