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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | 1x 1x 1x 1x 1x 1x 4x 4x 1x 1x 33x 33x 33x 33x 33x 1x 1x 1x 1x 1x 1x | // http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
// MIT license
const rAF: any = "requestAnimationFrame";
const cAF: any = "cancelAnimationFrame";
let _this: any = this || {};
const vendors: string[] = ['ms', 'moz', 'webkit', 'o'];
let lastTime: number = 0;
let x: number;
for (x = 0; x < vendors.length && !_this[rAF]; ++x) {
_this[rAF] = _this[vendors[x] + 'RequestAnimationFrame'];
_this[cAF] = _this[vendors[x] + 'CancelAnimationFrame']
|| _this[vendors[x] + 'CancelRequestAnimationFrame'];
}
if (!_this[rAF]) {
_this[rAF] = function ( callback: Function ) {
const currTime = Date.now(),
timeToCall = Math.max(0, 16 - (currTime - lastTime)),
id = setTimeout(function () { callback(currTime + timeToCall); }, timeToCall);
lastTime = currTime + timeToCall;
return id;
};
}
if (!_this[cAF]) {
_this[cAF] = function ( id: number ) {
clearTimeout( id );
};
}
let requestAnimationFrame = _this[ rAF ];
let cancelAnimationFrame = _this[ cAF ];
export { requestAnimationFrame, cancelAnimationFrame };
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