82 lines
1.6 KiB
JavaScript
82 lines
1.6 KiB
JavaScript
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/**
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* Debounce and throttle function's decorator plugin 1.0.6
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*
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* Copyright (c) 2009 Filatov Dmitry (alpha@zforms.ru)
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* Dual licensed under the MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*
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*/
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(function ($) {
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$.extend({
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/**
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* Debounce's decorator
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* @param {Function} fn original function
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* @param {Number} timeout timeout
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* @param {Boolean} [invokeAsap=false] invoke function as soon as possible
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* @param {Object} [ctx] context of original function
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*/
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debounce: function (fn, timeout, invokeAsap, ctx) {
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if (arguments.length == 3 && typeof invokeAsap != 'boolean') {
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ctx = invokeAsap;
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invokeAsap = false;
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}
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var timer;
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return function () {
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var args = arguments;
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ctx = ctx || this;
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invokeAsap && !timer && fn.apply(ctx, args);
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clearTimeout(timer);
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timer = setTimeout(function () {
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invokeAsap || fn.apply(ctx, args);
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timer = null;
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}, timeout);
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};
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},
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/**
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* Throttle's decorator
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* @param {Function} fn original function
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* @param {Number} timeout timeout
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* @param {Object} [ctx] context of original function
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*/
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throttle: function (fn, timeout, ctx) {
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var timer, args, needInvoke;
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return function () {
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args = arguments;
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needInvoke = true;
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ctx = ctx || this;
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timer || (function () {
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if (needInvoke) {
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fn.apply(ctx, args);
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needInvoke = false;
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timer = setTimeout(arguments.callee, timeout);
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}
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else {
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timer = null;
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}
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})();
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};
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}
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});
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})(jQuery);
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