25 lines
422 B
JavaScript
25 lines
422 B
JavaScript
/**
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*
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* @authors yutent (yutent@doui.cc)
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* @date 2017-02-27 21:56:03
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*
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*/
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'use strict'
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// 判断数组是否包含指定元素
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if (!Array.prototype.includes) {
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Object.defineProperty(Array.prototype, 'includes', {
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value: function(val) {
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for (let it of this) {
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if (it === val) {
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return true
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}
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}
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return false
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},
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enumerable: false,
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writable: true
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})
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}
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