ES6中增强的对象字面量的简单介绍

let name="jack"
// es6之前
var obj={name:name} // {name:"jack"}
// es6 
let obj={name}  // {name:"jack"}

// es6之前
var obj={sum: function(a, b){return a+b}}
// es6
let obj={sum(a, b){return a+b}} //{sum:function(a, b){return a+b}}

let key="name"
let obj={[key]:"jack"} // {name:'jack'}

let key="name"
let age=23
let person={
    [key]:"jack",
    getName(){return "jack"},
    age
} // {name:"jack",getName:function(){return "jack"},age:23}

let key="name"
let age=23
let person={
    [key]:"jack",
    getName(){return "jack"},
    age
}

"use strict";
var _person;
function _defineProperty(obj, key, value) {
 if (key in obj) {
  Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true });
   } else {
    obj[key] = value; 
    } 
    return obj; 
    }

var key = "name";
var age = 23;
var person = (_person = {}, _defineProperty(_person, key, "jack"), _defineProperty(_person, "getName", function getName() {
    return "jack";
}), _defineProperty(_person, "age", age), _person);