一个promise指定多个成功/失败的回调函数.都会调用？

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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>promise几个关键问题</title>
</head>
<body>

    <script>
        /* 1、如何改变promise的状态 
            (1)resolve(value) :如果当前的状态是pendding就会变成resolved
            (2)resolve(reason)) :如果当前的状态是pendding就会变成rejected
            (3)抛出异常:如果当前的状态是pendding就会变成rejected

            2.一个promise指定多个成功/失败的回调函数.都会调用？
            当promise状态改变时都会调用

        */
       let p = new Promise((resolve,reject) =>{
            //  resolve('成功')
             reject('失败')
             // throw '122'

        })

        // p.then((value) =>{console.log(value)}).catch(reason =>{
        //     console.log(reason);
        // })
      

        p.then(
            (value) =>{console.log(value)},

        (reason) =>{
            console.log('reason'+reason);
        })



        p.then(
            (value) =>{console.log(value)},

        (reason) =>{
            console.log('reason2'+reason);
        })
    </script>
    
</body>
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