类方法中的this指向

Tutorial: React基础 Category: React Published: 2026-04-07 13:58:26 Views: 20 Likes: 0 Comments: 0

10_类方法中的 this 指向

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Document</title>
  </head>
  <body>
    <script type="text/javascript">
      class Person {
        constructor(name, age) {
          this.name = name;
          this.age = age;
        }
        study() {
          // study方法放在了哪里?——类的原型对象上, 供实例使用
          // 通过Person实例调用study时, study中的this就是Person实例
          console.log(this);
        }
      }

      const p1 = new Person("tom", 18);
      p1.study(); // 通过实例调用study方法
      const x = p1.study;
      x(); // undefined
    </script>
  </body>
</html>