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/**
* Provides requestAnimationFrame in a cross browser way.
* http://paulirish.com/2011/requestanimationframe-for-smart-animating/
*/
if ( !window.requestAnimationFrame ) {
window.requestAnimationFrame = ( function() {
return window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( /* function FrameRequestCallback */ callback, /* DOMElement Element */ element ) {
window.setTimeout( callback, 1000 / 60 );
};
} )();
}
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