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es7 > es7/es2016

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现在官方按年份来，ES6/ES2015 因为之前有广泛的群众基础，ES7 还是叫的少 http://kangax.github.io/compat-table/es6/
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docs/array.md
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@ -334,7 +334,7 @@ console.log(entries.next().value); // [2, 'c']
## 数组实例的includes()
`Array.prototype.includes`方法返回一个布尔值，表示某个数组是否包含给定的值，与字符串的`includes`方法类似。该方法属于ES7，但Babel转码器已经支持。
`Array.prototype.includes`方法返回一个布尔值，表示某个数组是否包含给定的值，与字符串的`includes`方法类似。该方法属于ES7/ES2016，但Babel转码器已经支持。
```javascript
[1, 2, 3].includes(2); // true