未捕获的ReferenceError：未在onclick上定义obj

Question

<button class="btn btn-danger" onclick="obj.two">Show Oops</button>

<button class="btn btn-success" onclick="obj.edit">Edit Items</button>

每当我单击show oops时。在控制台中，错误是Uncaught ReferenceError：HTMLButtonElement.onclick中未定义obj

而我的JavaScript代码：

class User {

constructor()
    {
    this.name = "joker t-shirt";
    this.product = 200;
    this.Quantity = 4;
    this.total = this.product * this.Quantity;
    }


get two()  this is obj.two() ,but it spits out an error
   {    
   }

我收到错误消息，因为未定义对象，请帮我

Answer 1

您必须将obj定义为User()实例：

var obj = new User();

 class User { constructor() { this.name = "joker t-shirt"; this.product = 200; this.Quantity = 4; this.total = this.product * this.Quantity; } get two() { console.log('Show oops button is Working...'); } get edit() { console.log('Edit button is Working...'); } } var obj = new User(); 

 <button class="btn btn-danger" onclick="obj.two">Show Oops</button> <button class="btn btn-success" onclick="obj.edit">Edit Items</button>