49 lines
1.1 KiB
JavaScript
49 lines
1.1 KiB
JavaScript
var raf = function raf(callback) {
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return +setTimeout(callback, 16);
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};
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var caf = function caf(num) {
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return clearTimeout(num);
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};
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if (typeof window !== 'undefined' && 'requestAnimationFrame' in window) {
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raf = function raf(callback) {
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return window.requestAnimationFrame(callback);
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};
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caf = function caf(handle) {
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return window.cancelAnimationFrame(handle);
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};
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}
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var rafUUID = 0;
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var rafIds = new Map();
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function cleanup(id) {
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rafIds.delete(id);
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}
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var wrapperRaf = function wrapperRaf(callback) {
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var times = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;
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rafUUID += 1;
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var id = rafUUID;
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function callRef(leftTimes) {
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if (leftTimes === 0) {
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// Clean up
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cleanup(id);
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// Trigger
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callback();
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} else {
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// Next raf
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var realId = raf(function () {
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callRef(leftTimes - 1);
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});
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// Bind real raf id
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rafIds.set(id, realId);
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}
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}
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callRef(times);
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return id;
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};
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wrapperRaf.cancel = function (id) {
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var realId = rafIds.get(id);
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cleanup(realId);
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return caf(realId);
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};
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export default wrapperRaf; |