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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<!--
`minimum-scale=1` for disallowing scaling down this document even if there's any element wider than the ICB.
-->
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<title>Tests that scrollIntoView doesn't scroll to an element which is already in view in the minimum-scale viewport</title>
<script src="apz_test_native_event_utils.js"></script>
<script src="apz_test_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
html {
height: 10000px;
scroll-behavior: auto; /* to make scrolling instant */
}
#fixed {
position: fixed;
bottom: 0px;
height: 20vh;
overflow: scroll;
background-color: gray;
}
#name {
height: 10px;
width: 200vw; /* wider than the ICB */
}
</style>
</head>
<body>
<div id="fixed">
<input type="text" id="name" />
</div>
<script>
async function test() {
is(window.scrollY, 0, "The initial scroll offset should be 0");
is(visualViewport.scale, 1.0, "The document should not get scaled");
is(visualViewport.pageTop, 0, "The initial visual viewport pageTop should be 0");
visualViewport.addEventListener("scroll", () => {
ok(false, "Any VisualViewport scroll event should not be observed");
});
window.addEventListener("scroll", () => {
ok(false, "Any scroll event should not be observed");
});
// Scroll to the input element inside a position:fixed element.
document.querySelector("#name").scrollIntoView();
await promiseApzFlushedRepaints();
// Wait two frames to give a chance to scroll.
await promiseFrame();
await promiseFrame();
is(visualViewport.pageTop, 0, "The visual viewport pageTop should be zero");
is(window.scrollY, 0, "The scroll offset should be zero");
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
</body>
</html>