Created
April 23, 2017 23:31
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JavaScript throttle/debounce functions as a module
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| (function (global) { | |
| 'use strict'; | |
| var eventUtils = { | |
| debounce: function (fn, delay) { | |
| var timer = null; | |
| return function () { | |
| var context = this, args = arguments; | |
| clearTimeout(timer); | |
| timer = setTimeout(function () { | |
| fn.apply(context, args); | |
| }, delay); | |
| } | |
| }, | |
| throttle: function (fn, threshhold, scope) { | |
| threshhold || (threshhold = 250); | |
| var last, | |
| deferTimer; | |
| return function () { | |
| var context = scope || this; | |
| var now = +new Date, | |
| args = arguments; | |
| if (last && now < last + threshhold) { | |
| // hold on to it | |
| clearTimeout(deferTimer); | |
| deferTimer = setTimeout(function () { | |
| last = now; | |
| fn.apply(context, args); | |
| }, threshhold); | |
| } else { | |
| last = now; | |
| fn.apply(context, args); | |
| } | |
| } | |
| } | |
| }; | |
| // AMD support | |
| if (typeof define === 'function' && define.amd) { | |
| define(function () { return eventUtils; }); | |
| // CommonJS and Node.js module support. | |
| } else if (typeof exports !== 'undefined') { | |
| // Support Node.js specific `module.exports` (which can be a function) | |
| if (typeof module !== 'undefined' && module.exports) { | |
| exports = module.exports = eventUtils; | |
| } | |
| // But always support CommonJS module 1.1.1 spec (`exports` cannot be a function) | |
| exports.eventUtils = eventUtils; | |
| } else { | |
| global.eventUtils = eventUtils; | |
| } | |
| })(this); |
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