<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="scroll_support.js"></script>
<title>scrollend + mandatory scroll snap test</title>
<style>
#root {
width: 400px;
height: 400px;
overflow: auto;
scroll-snap-type: y mandatory;
border: 1px solid black;
--page-height: 400px;
}
#scroller {
height: 200px;
width: 200px;
overflow: auto;
border: 1px solid black;
--page-height: 200px;
}
.page {
height: var(--page-height);
scroll-snap-align: start;
}
.hidden {
display: none;
}
</style>
</head>
<body onload="runTests()">
<div id="root" class="hidden">
<h1>scrollend + mandatory scroll snap test</h1>
<div id="scroller">
<div class="page">
<p>Page 1</p>
</div>
<div class="page">
<p>Page 2</p>
</div>
<div class="page">
<p>Page 3</p>
</div>
</div>
<div class="page">
<p>Page A</p>
</div>
<div class="page">
<p>Page B</p>
</div>
<div class="page">
<p>Page C</p>
</div>
</div>
<script>
function runTests() {
const root_div = document.getElementById("root");
promise_test(async (t) => {
const targetScrollendPromise = createScrollendPromiseForTarget(t, root_div);
await waitForNextFrame();
root_div.classList.remove("hidden");
await waitForNextFrame();
await targetScrollendPromise;
await verifyScrollStopped(t, root_div);
}, "scrollend event fired after load for mandatory snap point");
}
</script>
</body>
</html>
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