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JavaScript 类继承
tryjs_classes_inherit
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<!DOCTYPE html> <html> <body> <h2>JavaScript 类继承</h2> <p>使用“extends”关键字从另一个类继承所有方法。</p> <p>使用“super”方法调用父类的构造函数。</p> <p id="demo"></p> <script> class Car { constructor(brand) { this.carname = brand; } present() { return 'I have a ' + this.carname; } } class Model extends Car { constructor(brand, mod) { super(brand); this.model = mod; } show() { return this.present() + ', it is a ' + this.model; } } let myCar = new Model("Ford", "Mustang"); document.getElementById("demo").innerHTML = myCar.show(); </script> </body> </html>