JS常用方法

数组方法：在Array.prototype中定义

ECMAScript3: 12个

1. join
2. reverse
3. sort
4. concat
5. slice
6. splice
7. push\pop
8. unshift\shift
9. toString\toLocaleString 区别在于new Date( ) “Thu Dec 14 2017 11:35:15 GMT+0800 (CST)” / “2017/12/14 上午11:35:15”

ECMAScript5: 10个

1. forEach
2. map
3. filter
4. every\some
5. reduce\reduceRight
6. indexOf\lastIndexOf
7. Array.isArray( )8

ECMAScript6: 6个

1. Array.from
2. Array.of
3. copyWithin
4. find
5. findIndex
6. fill

ECMAScript7: 1个

1. includes

字符串方法：在String.prototype中定义

ECMAScript3: 8个

1. split
2. slice
3. substring
4. substr
5. concat
6. indexOf
7. lastIndexOf
8. charAt

ECMAScript5: 1个

1. trim

ECMAScript6: 8个

1. includes
2. startsWith
3. endsWith
4. at
5. repeat
6. padStart\padEnd
7. 字符串模板

对象方法：在Object.prototype中定义

ECMAScript3:

ECMAScript5:

1. Object.isFrozen
2. Object.freeze
3. Object.seal
4. Object.isSealed
5. Object.isExtensible
6. Object.preventExtensions
7. Object.getOwnPropertyNames
8. Object.getOwnPropertyDescriptor
9. Object.defineProperties
10. Object.defineProperty
11. Object.create

ECMAScript6:

1. Object.is
2. Object.assign
3. Object.setPrototypeOf()
4. Object.getPrototypeOf()

迭代的方法：

1. Object.keys
2. Object.values
3. Object.entries
4. for….of
5. for….in