ES6Symbol在对象中的应用

let a=new String

let b=new Number

let c=new Boolean

let d=new Array

let e=new Object

let f=Symbol()

console.log(typeof f); //Symbol

 

let js=Symbol('技术')

console.log(js);

console.log(js.toString());

一个是Symbol，一个是字符串

let js = Symbol()

let obj = {

　　[js]: '技术'

}

console.log(obj[js]);

obj[js] = 'web'

console.log(obj[js]);

let obj = {

　　name: 'sun',

　　skill: 'web',

}

let age=Symbol()

obj[age] = 18

console.log(obj);

for (const item in obj) {

　　console.log(obj[item]);

}

console.log(obj[age]);