Rumah > Artikel > hujung hadapan web > 有关字面量和解构赋值一点知识介绍
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...’
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
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