javascript 类构造函数中的 ES6 解构
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时间：2020-10-28 15:13:52 来源:igfitidea点击:
ES6 Destructuring in Class constructor
提问by Lim H.
This may sound ridiculous but bear with me. I wonder if there is support on the language level to destructure object into class properties in constructor, e.g.
这听起来可能很荒谬，但请耐心等待。我想知道语言级别是否支持在构造函数中将对象解构为类属性，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}`;
}
}
回答by
You cannot assign to thisanywhere in the language.
您不能分配到this该语言的任何地方。
One option is to merge into thisor other object:
一种选择是合并到this或其他对象：
constructor(human) {
Object.assign(this, human);
}
