async和await

await只能放在async的里面
只能接一个promise

    <script>
    function 摇(猜测){
        return new Promise((resolve,reject)=>{
            console.log('开始');
                setTimeout(()=>{
                    let n = parseInt(Math.random()* 6 + 1,10);
                    if(n>3){
                        if(猜测 ==="大"){
                            resolve(n);
                        } else{
                            reject(n);
                        }
                    }else{
                        if(猜测 === "小"){
                            resolve(n);
                        } else {
                            reject(n);
                        }
                    }
                },1000);        
            });
    
        }
    
        async function test() {
            try{
                let n = await 摇("大");
                    console.log("赢" + n);
            }catch(error){
                console.log("输" + error);
            } 
        }
     test();
</script>
//-------------------接收多个promise
  /* async function test() {
            try{
                let n = await Promise.all([猜大小('大'),猜大小('小')]);
                    console.log("赢" + n);
            }catch(error){
                console.log("输" + error);
            }  
        }
    */