html运行实例（js_class_method

代码示例：（标识：js_class_method_1）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 类方法</h1>

<p>如何定义和使用类方法。</p>

<p id="demo"></p>

<script>
class Car {
  constructor(name, year) {
    this.name = name;
    this.year = year;

  }
  age() {
    let date = new Date();
    return date.getFullYear() - this.year;
  }
}

let myCar = new Car("Ford", 2014);
document.getElementById("demo").innerHTML =
"My car is " + myCar.age() + " years old.";
</script>

</body>
</html>