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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width; initial-scale=1.0">
<title>Tests that layout viewport is not larger than visual viewport on fullscreen</title>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
body {
margin: 0;
padding: 0;
overflow-x: hidden;
}
</style>
</head>
<body>
<div style="background: blue; width: 100%; height: 100%;"></div>
<div style="background: red; width: 200%; height: 100px;">overflowed element</div>
<div id="target" style="background: green; width: 100px; height: 100px;"></div>
<script type="application/javascript">
const utils = SpecialPowers.getDOMWindowUtils(window);
function waitForFullscreenChange() {
return new Promise(resolve => {
document.addEventListener("fullscreenchange", resolve);
});
}
async function test() {
target.requestFullscreen();
await waitForFullscreenChange();
is(document.fullscreenElement, target,
"The target element should have been fullscreen-ed");
// Try to move rightward, but it should NOT happen.
utils.scrollToVisual(200, 0, utils.UPDATE_TYPE_MAIN_THREAD,
utils.SCROLL_MODE_INSTANT);
await waitUntilApzStable();
is(visualViewport.offsetLeft, 0,
"The visual viewport offset should never be moved");
document.exitFullscreen();
}
waitUntilApzStable().then(test).then(subtestDone, subtestFailed);
</script>
</body>
</html>
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