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<!DOCTYPE html>
<html>
<body>
<div class="container">
<div style="width: 2500px; height: 500px; background-color: green;"></div>
<button id="fullscreen-button" style="margin-top: 2px; border: 1px solid black; border-radius: 0; background-color: white;"> Request fullscreen!</button>
PASS if visually equal after exiting fullscreen (no scrolling has happened).
</div>
<style>
.container { overflow: hidden scroll; position: relative; scrollbar-width: none; }
</style>
</body>
</html>