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<html><body><h1>JavaScript Class Methods</h1><p>How to define and use a Class method.</p><p id="demo"></p><script>class Car { constructor(name, year) { this.name = name; this.year = year; } age() { const date = new Date(); return date.getFullYear() - this.year; }}const myCar = new Car("Ford", 2014);document.getElementById("demo").innerHTML ="My car is " + myCar.age() + " years old.";</script></body></html>