1.数组-拆分
const arr =[1,2,3,4,5,6,7]
const [a,b,...c] = arr
console.log(a,b,c)
2.数组-合并
const a = [1,2,3],b = [4,5,6]
const c = [...a,...b]
console.log(c)
3.字符串-转数组
const [...arr] = ‘string‘
4.类数组-转数组
const [...div] = document.getElementsByTagName(‘div‘)
5.实现迭代器接口的数据
const obj = {
*[Symbol.iterator](){
yield 1
yield 2
yield 3
yield 4
yield 8
}
}
console.log([...obj])
6.对象解构
let {name,age,...other} = {name:‘zhangsan‘,age:18,job:‘前端开发‘,province:‘深圳‘}
console.log(name,age,other)
7....赋值语句
const obj = {a:1,b:2}
const o = {a:8,c:13,...obj}
const obj1 = {a:12,b:23}
const obj = {c:89,d:99}
const newobj = {...obj1,...obj2}
8.使用表达式
const isTrue = true
const obj = {...(isTrue? obj1:obj2),c:33}
9.三点（...）赋值解构数组,会隐式调用其object方法
console.log({...[1,2,3]})
console.log({...‘string‘})
10. 函数使用：... 获取剩余参数
function demo(a,b,...params){
console.log(params)
}
demo(1,2,3,4,5,6)
11.将数组传递给参数
function demo(...args){
console.log(args)
}
const arr = [2,3,4,5]
demo.apply(null,arr)
demo(...arr)
12.其它
不能解构 null 和undefined
结构是浅复制
... 无法解构原型属性，属性解构是可以的
解构 - 三个点运算符