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1 <!DOCTYPE html> | |
2 <!-- saved from url=(0048)http://fiddle.jshell.net/bt8dhkrn/10/show/light/ --> | |
3 <!-- here we have two divs that jitter together --> | |
4 | |
5 <style> | |
6 #jitter-parent { | |
7 width: 100px; | |
8 height: 100px; | |
9 background: papayawhip; | |
10 border: 1px solid black; | |
11 will-change: transform; | |
12 } | |
13 | |
14 #jitter-child { | |
15 width: 50px; | |
16 height: 50px; | |
17 background: green; | |
18 border: 1px solid black; | |
19 will-change: transform; | |
20 } | |
21 | |
22 #scrolled { | |
23 width: 100px; | |
24 height: 100px; | |
25 background: red; | |
26 border: 1px solid black; | |
27 will-change: transform; | |
28 } | |
29 | |
30 body { | |
31 height: 2500px; | |
32 } | |
33 </style> | |
34 | |
35 <script> | |
36 window.onload=function(){ | |
37 tick = function(timestamp) { | |
38 document.getElementById("jitter-parent").style.transform = "translate(0px, "
+ document.body.scrollTop + "px)"; | |
39 window.requestAnimationFrame(tick); | |
40 } | |
41 window.requestAnimationFrame(tick); | |
42 | |
43 jank = function(timestamp) { | |
44 for (var i = 0; i < 10; ++i) { | |
45 Date.now(); | |
46 } | |
47 window.setTimeout(jank, 50); | |
48 } | |
49 window.setTimeout(jank, 50); | |
50 } | |
51 </script> | |
52 | |
53 <div id="jitter-parent" style="transform: translate(0px, 0px);"> | |
54 <div id="jitter-child"></div> | |
55 </div> | |
56 <div id="scrolled"></div> | |
57 </html> | |
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