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<head>
<meta name="viewport" content="width=device-width; initial-scale=1.0">
<title>Wheel-scrolling over inactive subframe with overscroll-behavior</title>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script type="application/javascript">
async function test() {
var subframe = document.getElementById("scroll");
// scroll over the middle of the subframe, and make sure that the page
// does not scroll.
var waitForScroll = false; // don't wait for a scroll event, it will never come
await promiseMoveMouseAndScrollWheelOver(subframe, 100, 100, waitForScroll);
ok(window.scrollY == 0, "overscroll-behavior was respected");
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
<style>
#scroll {
width: 200px;
height: 200px;
overflow: scroll;
overscroll-behavior: contain;
}
#scrolled {
width: 200px;
height: 1000px; /* so the subframe has room to scroll */
background: linear-gradient(red, blue); /* so you can see it scroll */
}
</style>
</head>
<body>
<div id="scroll">
<div id="scrolled"></div>
</div>
<div style="height: 5000px;"></div><!-- So the page is scrollable as well -->
</body>
</head>
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