前端面试宝典

  
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      class Button {
        constructor() {
          this.button = document.createElement("button");
          this.button.innerText = "Click Me";
          this.button.addEventListener("click", this.handleClick.bind(this));
          document.body.appendChild(this.button);
        }

        handleClick() {
          alert("Button clicked!");
        }
      }

      const myButton = new Button();
      document.body.appendChild(myButton.button);
    </script>
  </body>
</html>