​x
 
<!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>
​