Object.entries()

js 中的Object.entries()方法返回一个给定对象自身可枚举属性的键值对

/* Demo */
const obj = {
  name: 'hxx',
  age: 18
};

for (let [key, value] of Object.entries(obj)) {
  console.log(`${key}: ${value}`);
}

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new Map()构造函数接受一个可迭代的entries，借助Object.entries() 可容易的将object转化成Map:

let map = new Map(Object.entries(obj))

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