69 lines
1.4 KiB
JavaScript
69 lines
1.4 KiB
JavaScript
"use strict";
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exports.__esModule = true;
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exports["default"] = throttle;
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/**
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* @author {@link https://github.com/jashkenas/underscore underscorejs}.
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* @version 1.7.0
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* @see {@link http://underscorejs.org/#throttle underscore.throttle(function, wait, [immediate])}
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* @param func
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* @param wait
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* @param options
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* @returns {throttled}
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*/
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/* eslint-disable */
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function throttle(func, wait, options) {
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var context, args, result;
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var timeout = null;
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var previous = 0;
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var _now = Date.now || function () {
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return new Date().getTime();
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};
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if (!options) {
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options = {};
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}
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var later = function later() {
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previous = options.leading === false ? 0 : _now();
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timeout = null;
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result = func.apply(context, args);
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if (!timeout) {
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context = args = null;
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}
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};
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return function () {
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var now = _now();
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if (!previous && options.leading === false) {
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previous = now;
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}
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var remaining = wait - (now - previous);
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context = this;
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args = arguments;
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if (remaining <= 0 || remaining > wait) {
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if (timeout) {
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clearTimeout(timeout);
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timeout = null;
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}
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previous = now;
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result = func.apply(context, args);
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if (!timeout) {
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context = args = null;
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}
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} else if (!timeout && options.trailing !== false) {
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timeout = setTimeout(later, remaining);
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}
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return result;
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};
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} |