42 lines
948 B
HTML
42 lines
948 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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.fixed {
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position: fixed;
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width: 10px;
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height: 10px;
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z-index: -1;
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background-color: silver;
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}
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</style>
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<script type="text/javascript">
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if (window.internals)
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window.internals.settings.setAcceleratedCompositingForFixedPositionEnabled(true);
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if (window.testRunner) {
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testRunner.dumpAsText();
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window.addEventListener("load", function() {
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document.getElementById("synchronousScrollingReasons").innerText = window.internals.synchronousScrollingReasons();
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}, false);
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}
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</script>
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</head>
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<body>
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<div style="height: 1000px">
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Main thread scrolling reasons should be blank:
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<pre id="synchronousScrollingReasons"></pre>
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</div>
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<!-- out of view fixed position elements should not trigger main thread scrolling. -->
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<div class="fixed"></div>
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<div class="fixed" style="top: -100px"></div>
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<div class="fixed" style="top: 0px; left: 1000px"></div>
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</body>
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</html>
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