Replaces the standard jQuery timer loop with requestAnimationFrame where supported. Requires jQuery 1.8
Replaces the standard jQuery timer loop with
NOTE: jQuery 3.0.0 & newer uses
requestAnimationFramenatively if it's available in the browser. This plugin is only needed for older versions of jQuery. If it detects jQuery 3.0 or newer it warns and does nothing.
Requires jQuery 1.8+
requestAnimationFrameis a W3C spec (at Candidate Recommendation level) that attempts to improve our animation performace by better syncing up with the frame rate of the browser. For more information, read this article on Jank Busting
To quote part of the Jank Busting article:
Animations in background tabs get paused, conserving system resources and battery life.
If the system can't handle rendering at the screen's refresh rate, it can throttle animations and produce the callback less frequently (say, 30 times a second on a 60Hz screen). While this drops framerate in half, it keeps the animation consistent -- and as stated above, our eyes are much more attuned to variance than framerate. A steady 30Hz looks better than 60Hz that misses a few frames a second.
In your web page:
There isn't anything you need to do other than include the
jquery.requestanimationframe.jsfile to use
You should however beware of the first point above: Animations in background tabs get paused.
This means if you are using a
setTimeoutto queue up new animations, when the user returns to the backgrounded page, jQuery will finally see an animation finish, and then start playing everything queued. There is more information about potential workarounds in jQuery Core Bug #9381
In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using grunt.
Also, please don't edit files in the "dist" subdirectory as they are generated via grunt. You'll find source code in the "src" subdirectory!
oprefix - opera only ships with unprefixed rAF
Copyright (c) 2012 Corey Frang Licensed under the MIT license.