javascript - 面向对象的JS

Question

为什么不起作用？当我尝试调用 example.example() 时，我收到 TypeError: example.example is not a function.

var example = class {
constructor(){
    this.example = false;
}

id(){
    this.example = !this.example;
    return this.example;
}
};

Answer 1

When I'm trying to call example.example() I'm getting TypeError: example.example is not a function.

example是对匿名类的引用，它的构造函数只能用new调用

您需要将其称为

var a = new example();
a.example; //false

演示

var example = class {
  constructor() {
    this.example = false;
  }

  id() {
    this.example = !this.example;
    return this.example;
  }
};
var a = new example()

console.log(a.example);