x
<html><body><h1>JavaScript Class Method</h1><p>Pass a parameter into the "age()" method.</p><p id="demo"></p><script>class Car { constructor(name, year) { this.name = name; this.year = year; } age(x) { return x - this.year; }}const date = new Date();let year = date.getFullYear();const myCar = new Car("Ford", 2014);document.getElementById("demo").innerHTML="My car is " + myCar.age(year) + " years old.";</script></body></html>