介绍

扩展运算符能将[数组]转换位逗号分隔的[参数序列]

声明一个数组

    const boby =['张倩','李旺','赵茜']

声明一个函数

function chuan(){
            console.log(arguments);
        }
        chuan(...boby)

 应用

 1.数组的合并

const kuaizi =['王太利','肖央'];
        const babb =['焊丝里','花花'];
        const klok =kuaizi.concat(fenghuang);
        const klok = ['...kuaizi,...babb'];
        console.log(klok);

变成数组（

const klok = ['...kuaizi,...babb'];

）

2.数组的克隆

浅拷贝

const szh = ['E','G','M'];
        const kel =[...szh];
        console.log(kel);

3.将伪数组转化为真数组

const divs = document.querySelectorAll('div')
        const divArr = [...divs]
        console.log(divArr);