зеркало из https://github.com/mozilla/gecko-dev.git
129 строки
3.0 KiB
HTML
129 строки
3.0 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=1247074
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-->
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<head>
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<meta charset="utf-8">
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<title>Test for Bug 1247074</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" src="/tests/SimpleTest/paint_listener.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<style>
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.outer {
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direction: ltr;
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height: 400px;
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width: 415px;
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overflow: hidden;
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position: relative;
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}
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.inner {
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height: 100%;
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outline: none;
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overflow-x: hidden;
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overflow-y: scroll;
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position: relative;
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scroll-behavior: smooth;
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}
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.outer.contentBefore::before {
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top: 0;
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content: '';
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display: block;
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height: 2px;
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position: absolute;
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width: 100%;
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z-index: 99;
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}
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</style>
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</head>
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<body>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1247074">Mozilla Bug 1247074</a>
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<p id="display"></p>
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<div class="outer">
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<div class="inner">
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<ol>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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<li>Some text</li>
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</ol>
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</div>
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</div>
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<script>
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SimpleTest.waitForExplicitFinish();
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window.onload = function() {
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var elm = document.getElementsByClassName('inner')[0];
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// Take control of the refresh driver
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var utils = SpecialPowers.DOMWindowUtils;
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utils.advanceTimeAndRefresh(0);
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// Start a smooth scroll and advance a couple of frames so we're in the
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// middle of the scroll animation
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elm.scrollTop = 500;
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utils.advanceTimeAndRefresh(16);
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utils.advanceTimeAndRefresh(16);
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// Trigger a frame reconstruction
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elm.parentNode.classList.add('contentBefore');
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// Reach a stable state and verify the scroll position is 500
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utils.restoreNormalRefresh();
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waitForAllPaintsFlushed(function() {
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SimpleTest.is(elm.scrollTop, 500, "Scroll position ended up at 500");
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SimpleTest.finish();
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});
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}
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</script>
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</body>
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</html>
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