<script>
// 『...』 扩展运算符能将『数组』转换为逗号分隔的『参数序列』
//声明一个数组 ...
const tfboys = ['易烊千玺','王源','王俊凯'];
// => '易烊千玺','王源','王俊凯'
// 声明一个函数
function chunwan(){
console.log(arguments);
console.log(arguments[0]);
console.log(arguments[1]);
console.log(arguments[2]);
}
chunwan(...tfboys);// chunwan('易烊千玺','王源','王俊凯')
</script>
结果：
（2）应用
1. 数组的合并 const kuaizi = ['王太利','肖央'];
const fenghuang = ['曾毅','玲花'];
// 原始写法
// const zuixuanxiaopingguo = kuaizi.concat(fenghuang);
const zuixuanxiaopingguo = [...kuaizi, ...fenghuang];
console.log(zuixuanxiaopingguo);
结果：
2. 数组的克隆
const sanzhihua = ['E','G','M'];
const sanyecao = [...sanzhihua];// ['E','G','M']
console.log(sanyecao);
3. 将伪数组转为真正的数组
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>扩展运算符应用</title>
</head>
<body>
<div></div>
<div></div>
<div></div>
<script>
// 将伪数组转为真正的数组
const divs = document.querySelectorAll('div');
const divArr = [...divs];
console.log(divArr);// arguments
</script>
</body>
</html>
结果：
标签：ES6,console,log,...,运算符,arguments,数组,const From： https://www.cnblogs.com/anjingdian/p/16905221.html