StackOverflow2013

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plurals

PO
primarykey
Id
13398368
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2012-11-15T13:23:59.133
FavoriteCount
0
LastActivityDate
2012-11-15T14:59:53.743
LastEditDate
2012-11-15T14:59:53.743
LastEditorUserId
1240745
OwnerUserId
1240745
ParentId
13241314
PostTypeId
2
Score
3
ViewCount
0
LastEditorDisplayName
text
Body
I had just read that article too and was curious to try this myself. I've taken a stab at adding a wrapper to the rAF callback in browsers that don't support high-resolution timers. It uses Paul Irish's original polyfill with the following added lines: <pre><code>var hasPerformance = !!(window.performance && window.performance.now); // Add new wrapper for browsers that don't have performance if (!hasPerformance) { // Store reference to existing rAF and initial startTime var rAF = window.requestAnimationFrame, startTime = +new Date; // Override window rAF to include wrapped callback window.requestAnimationFrame = function (callback, element) { // Wrap the given callback to pass in performance timestamp var wrapped = function (timestamp) { // Get performance-style timestamp var performanceTimestamp = (timestamp < 1e12) ? timestamp : timestamp - startTime; return callback(performanceTimestamp); }; // Call original rAF with wrapped callback rAF(wrapped, element); } } </code></pre> Here's a gist of it all combined together and an updated example using the new code: <a href="https://gist.github.com/4078614" rel="nofollow">https://gist.github.com/4078614</a> <a href="http://jsfiddle.net/timhall/XQpzU/4351/" rel="nofollow">http://jsfiddle.net/timhall/XQpzU/4351/</a> This approach aims at normalizing the parameter that is passed into the callback function to the high-resolution timer format. You could use a similar approach, just opposite, to convert the high-resolution timer to the old format if you have existing code expecting that, but I see that as a regression. I'm going to try it out in one of my projects that I'm working on right now and will update the gist if I find any issues / improvements.
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1. POUp to date polyfill for requestAnimationFrame
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1. PTAnswer
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1. USTim Hall
UserOwnerUserId
1. USTim Hall
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