关于回调函数

 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //有回调函数，就一定是异步的吗？
        setTimeout(()=>{
            console.log('ok');
        },1000)

    // let arr = [1,2,3,4,6,8]
    // arr.forEach((item,index)=> {
            // console.log('索引为:${index},该项为:${item}');
    // });
    // console.log(1);
   </script>

</body>
</html>

 

posted @ 2022-07-11 10:37  罗砂  阅读(24)  评论(0)    收藏  举报