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+<!DOCTYPE html>
+<html reftest-async-scroll
+ reftest-displayport-x="0" reftest-displayport-y="0"
+ reftest-displayport-w="800" reftest-displayport-h="1000"
+ reftest-async-scroll-x="0" reftest-async-scroll-y="50"
+ reftest-async-zoom="2.0">
+<head>
+ <style>
+ html {
+ scrollbar-width: none;
+ }
+ body {
+ height: 3000px;
+ margin: 0;
+ }
+ div {
+ position: fixed;
+ top: 0;
+ width: 100px;
+ height: 100px;
+ background: green;
+ }
+ </style>
+</head>
+<body>
+ <!-- Test that position:fixed elements are attached to the layout viewport
+ instead of the visual viewport.
+
+ An async scroll of 50 CSS pixels will scroll the visual viewport by 100
+ screen pixels (since async zoom is set to 2.0) and result in the top
+ half of the div being scrolled out of view. -->
+ <div></div>
+</body>
+</html>