js Map数据类型的三种遍历方法

 1、forEach方法

const map = new Map([['key1','v1'],['key2','v2'],['key3','v3']]);
console.log(map);
map.forEach((val,key) => {
  console.log(val,key);
})

2、entries

const map = new Map([['key1','v1'],['key2','v2'],['key3','v3']]);
for(let i of map) {
  console.log(i);
}

 3、for…of…

for(let [key,val] of map.entries()){
    ...
}