js中map数据结构

<script>
    //在对象中，所有的key，最终都会转成字符串类型
    let user={
       "name":"贾维斯",
       age:20
    }
    let root =document.querySelector('#root')
    user[root]="文本"
    console.log(user);
    let map=new Map()
    map.set(root,"文本")
    console.log(map);
    let arr=new Map()
    arr.set(['a'],55)
    console.log(arr.get(['a']));
    let map1=new Map()
    let k1=["贾维斯"]
    let k2=["星期五"]
    map1.set(k1,100)
    map1.set(k2,200)
    console.log(map1.get(k1));
</script>