93 lines
2.4 KiB
HTML
93 lines
2.4 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<style>
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* {
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box-sizing: border-box;
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}
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body {
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transform: translateZ(0px);
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}
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.scroller {
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position: relative;
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margin: 20px;
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width: 600px;
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height: 580px;
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overflow-x: hidden;
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overflow-y: auto;
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perspective-origin: right bottom;
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perspective: 1px;
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border: 1px solid black;
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}
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.preserve3d {
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transform-origin: top left;
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transform-style: preserve-3d;
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}
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.box {
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height: 12000px;
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background-color: rgba(0, 0, 0, 0.2);
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}
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.parallax {
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background-size: cover;
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box-sizing: border-box;
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width: 80%;
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margin-left: 20px;
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height: 1300px;;
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/* Since the parallax elements still consume space, we set the margin to undo
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the height of this parallax element making it essentially consume 0 space.
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*/
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margin-bottom: -1300px;
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}
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.tester {
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position: relative;
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z-index: 1;
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background-color: green;
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margin-top: 200px;
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height: 600px;
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width: 100%;
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will-change: transform;
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}
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.filler {
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background-color: silver;
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}
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</style>
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<script>
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if (window.testRunner) {
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testRunner.waitUntilDone();
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testRunner.dumpAsText();
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}
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window.addEventListener('load', () => {
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setTimeout(() => {
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let scroller = document.querySelector('.scroller');
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scroller.scrollTop = 400;
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if (window.internals)
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document.getElementById('layers').innerText = window.internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_BACKING_STORE_ATTACHED);
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if (window.testRunner)
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testRunner.notifyDone();
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}, 0);
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}, false);
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</script>
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</head>
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<body>
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<div class="scroller">
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<div class="preserve3d">
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<div class="parallax" style="transform: translate3d(0px, -220px, -2px);"></div>
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<div class="box tester"> </div>
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<div class="box filler"></div>
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</div>
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</div>
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<pre id="layers"></pre>
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</body>
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</html>
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