| 1 | export default (function (func, wait, options) {
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| 2 | var timeout, context, args, result;
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| 3 | var previous = 0;
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| 4 | if (!options)
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| 5 | options = {};
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| 6 | var later = function () {
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| 7 | previous = options.leading === false ? 0 : Date.now();
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| 8 | timeout = null;
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| 9 | result = func.apply(context, args);
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| 10 | if (!timeout)
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| 11 | context = args = null;
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| 12 | };
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| 13 | var throttled = function () {
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| 14 | var now = Date.now();
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| 15 | if (!previous && options.leading === false)
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| 16 | previous = now;
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| 17 | var remaining = wait - (now - previous);
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| 18 | context = this;
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| 19 | args = arguments;
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| 20 | if (remaining <= 0 || remaining > wait) {
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| 21 | if (timeout) {
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| 22 | clearTimeout(timeout);
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| 23 | timeout = null;
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| 24 | }
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| 25 | previous = now;
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| 26 | result = func.apply(context, args);
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| 27 | if (!timeout)
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| 28 | context = args = null;
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| 29 | }
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| 30 | else if (!timeout && options.trailing !== false) {
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| 31 | timeout = setTimeout(later, remaining);
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| 32 | }
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| 33 | return result;
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| 34 | };
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| 35 | throttled.cancel = function () {
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| 36 | clearTimeout(timeout);
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| 37 | previous = 0;
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| 38 | timeout = context = args = null;
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| 39 | };
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| 40 | return throttled;
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| 41 | });
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| 42 | |
| \ | No newline at end of file |