JavaScript原型繼承的小例子

<script>
    // 父類 Animal
    var Animal = function() {
        this.name = 'animal';
    };

    Animal.prototype = {

        run: function() {
            console.log(this.name + " run....");
        },

        eat: function() {
            console.log(this.name + " eat...");
        }
    }

    var Dog = function() {

        Animal.call(this);

        name = 'dog';

        this.name = name;

    }

    Dog.prototype = Object.create(Animal.prototype);
    Dog.prototype.constructor = Dog;

    // 覆蓋
    Dog.prototype.run = function() {
        console.log(this.name + "...run...run...");
    }

    // test

    var animal = new Animal();
    animal.eat(); // animal eat...

    var dog = new Dog();
    dog.eat(); // dog eat...
    dog.run(); // dog...run...run...
</script>