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106 lines
2.8 KiB
JavaScript
106 lines
2.8 KiB
JavaScript
/*
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Copyright (c) 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative
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Reporters & Editors
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following
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conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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This is a partial version of the library that only includes a few
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underscore methods.
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*/
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/* eslint-disable */
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var _ = _ || {};
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_.now = Date.now || function() {
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return new Date().getTime();
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};
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_.throttle = function(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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if (!options) { options = {};
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}
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var later = function() {
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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) { 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) { 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) { 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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};
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_.debounce = function(func, wait, immediate) {
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var timeout, args, context, timestamp, result;
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var later = function() {
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var last = _.now() - timestamp;
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if (last < wait && last >= 0) {
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timeout = setTimeout(later, wait - last);
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} else {
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timeout = null;
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if (!immediate) {
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result = func.apply(context, args);
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if (!timeout) { context = args = null;
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}
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}
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}
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};
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return function() {
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context = this;
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args = arguments;
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timestamp = _.now();
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var callNow = immediate && !timeout;
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if (!timeout) { timeout = setTimeout(later, wait);
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}
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if (callNow) {
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result = func.apply(context, args);
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context = args = null;
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}
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return result;
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};
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};
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