lovecoding
/
W260426


			
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							<!DOCTYPE html>
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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // promise 可以直接后边写 then和catch方法
        // new Promise((resolve,reject)=>{
        //     resolve("3")
        // }).then((res)=>{
        //     console.log(res);
        // }).catch((err)=>{
        //     console.log(err);
        // })


        console.log("1");
        setTimeout(() => {
            console.log("2");
        }, 0);

        new Promise((resolve, reject) => {
            // setTimeout(() => {
                resolve("3")
            // }, 0);
        }).then((res) => {
            console.log(res);
        })
        console.log("4");


    </script>
</body>

</html>