箭头函数
2018-04-03 本文已影响0人
Clayten
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
let fn = v => v;//第一个v参数，第二个v是返回值
let fn1 = () => "hi";
let fn2 = v => {
console.log(v+".....");
console.log(v+".....");
console.log(v+".....");
}
fn2(12)
let fn3 = (x =20, y = 10) =>{
console.log(x+y);
}
fn3(20,20);
</script>
</body>
</html>
