Javascript 遍历Map

 for (let index of map.values()){//index=value
            console.log(index)
        }
        for (let index of map.keys()){//index=key,通过map.get(key)获取value
            console.log(index,map.get(index))
        }
        map.forEach(function (value, key){//输出的value在前 ，key在后
          console.log(value,key)
        })