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<!DOCTYPE html> <html> <body> <h2>JavaScript 类</h2> <p>在这个例子中，我们演示了一个简单的类定义以及如何使用它。</p> <p id="demo"></p> <script> class Car { constructor(brand) { this.carname = brand; } } mycar = new Car("Ford"); document.getElementById("demo").innerHTML = mycar.carname; </script> </body> </html>