Class 构造函数中的 ES6 解构

Question

这听起来可能很荒谬，但请耐心等待。我想知道在语言级别是否支持将对象解构为构造函数中的 class 属性，例如

class Human {
    // normally
    constructor({ firstname, lastname }) {
        this.firstname = firstname;
        this.lastname = lastname;
        this.fullname = `${this.firstname} ${this.lastname}`;
    }

    // is this possible?
    // it doesn't have to be an assignment for `this`, just something
    // to assign a lot of properties in one statement
    constructor(human) {
        this = { firstname, lastname };
        this.fullname = `${this.firstname} ${this.lastname}`;
    }
}

Answer 1

您不能在该语言的任何地方分配给 this。

一个选项是合并到 this 或其他对象：

constructor(human) {
  Object.assign(this, human);
}

Class 构造函数中的 ES6 解构

ES6 Destructuring in Class constructor

javascript

destructuring

ecmascript-6