增强的对象字面量，解构赋值

字面量（自变量）

     let name="wei";
	let age=3;
	let obj={
		//简写变量，等同于name:name
		name,
		age
	}
		console.log(obj.name)//wei
	let qqq = {
	  name: 'wrs',
	  toString () {  // 'function' keyword is omitted here
	    return this.name;
	  }
	};


	console.log(qqq.toString()); // wrs

//通过对象字面量创建对象

	var human = {
	    breathe() {
	        console.log('breathing...');
	    }
	};
	var worker = {
	    __proto__: human, //设置此对象的原型为human,相当于继承human
	    company: 'freelancer',
	    work() {
	        console.log('working...');
	    }
	};
	human.breathe();//输出 ‘breathing...’
	//调用继承来的breathe方法
	worker.breathe();//输出 ‘breathing...’

解构赋值

允许提取数组和对象里的值，赋给变量。

function foo() {
  return [1,2,3];
}
let arr = foo(); // [1,2,3]

let [a, b, c] = foo();
console.log(a, b, c); // 1 2 3

function bar() {
  return {
    x: 4,
    y: 5,
    z: 6
  };
}
let {x: x, y: y, z: z} = bar();
console.log(x, y, z); // 4 5 6