[Mac] Remove backing store for layers that are outside the viewport
[WebKit-https.git] / LayoutTests / compositing / fixed-position-scroll-offset-history-restore.html
1 <!DOCTYPE html>
2 <html>
3 <body style="overflow:hidden">
4   <div style="height:2000px;"></div>
5
6   <!-- Red div to indicate test failure -->
7   <div style="position: absolute; top: 250px; width: 200px; height: 100px; background-color: red;"></div>
8
9   <!-- Green fixed-position, composited div which covers the red div after we scroll -->
10   <div style="position: fixed; -webkit-transform: translateZ(0); top: 50px; width: 200px; height: 100px; background-color: green;"></div>
11
12 <script>
13 if (window.testRunner) {
14     testRunner.waitUntilDone();
15 }
16
17 onload = function() {
18     if (window.localStorage.stage == 'two') {
19         // We went foward and back again.
20         // If the scroll position is restored correctly the red div won't be visible.
21         delete window.localStorage.stage;
22         if (window.testRunner) {
23             testRunner.dumpAsText(true);
24             testRunner.notifyDone();
25         }
26     } else {
27         window.localStorage.stage = 'two';
28         window.scrollTo(0, 200);
29         setTimeout(function() {
30             window.location.href = 'resources/fixed-position-scroll-offset-history-restore-2.html';
31         }, 0);
32     }
33 };
34 </script>
35 </body>
36 </html>
37