JavaScript 静态方法

class dida100 {
  constructor(name) {
    this.name = name;
  }
  static hello() {
    return "Hello!!";
  }
}
 
let noob = new dida100("嘀嗒教程");
 
// 可以在类中调用 'hello()' 方法
document.getElementById("demo").innerHTML = dida100.hello();
 
// 不能通过实例化后的对象调用静态方法
// document.getElementById("demo").innerHTML = noob.hello();
// 以上代码会报错

class dida100 {
  constructor(name) {
    this.name = name;
  }
  static hello(x) {
    return "Hello " + x.name;
  }
}
let noob = new dida100("嘀嗒教程");
document.getElementById("demo").innerHTML = dida100.hello(noob);