JavaScript ES6 类中的私有属性 [英] Private properties in JavaScript ES6 classes

问题描述

是否可以在 ES6 类中创建私有属性?

Is it possible to create private properties in ES6 classes?

这是一个例子.如何阻止对 instance.property 的访问?

Here's an example. How can I prevent access to instance.property?

class Something {
  constructor(){
    this.property = "test";
  }
}

var instance = new Something();
console.log(instance.property); //=> "test"

推荐答案

私人课程功能在第3阶段提案中.其大部分功能支持所有主要浏览器.

Private class features is in Stage 3 proposal. The majority of its features are supported by all major browsers.

class Something {
  #property;

  constructor(){
    this.#property = "test";
  }

  #privateMethod() {
    return 'hello world';
  }

  getPrivateMessage() {
      return this.#property;
  }
}

const instance = new Something();
console.log(instance.property); //=> undefined
console.log(instance.privateMethod); //=> undefined
console.log(instance.getPrivateMessage()); //=> test
console.log(instance.#property); //=> Syntax error

这篇关于JavaScript ES6 类中的私有属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！