<html><body><h2>JavaScript 类方法</h2><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>