构造继承

作者: 杰克_王_ | 来源:发表于2019-10-20 14:12 被阅读0次

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>构造继承</title>
</head>

<body>
    <script>
        /*
        call 是以对象列表的方式进行传参
        apply 使用数组的方式进行传参
        */
        /*
        不能继承原型方法
        */

        function Animal(category) {
            this.category = category || "Animal";
            this.run = function () {
                console.log("Animal run");
            }
        }

        Animal.prototype.walk = function () {
            console.log("Animal walk");
        }

        function Dog(category, name) {
            Animal.call(this, category);
            // Animal.apply(this, [category]);
            this.name = name || 'dog';
            this.type = 'dog';
        }

        var dog = new Dog("dog", "小白");
        console.log(dog);
    </script>
</body>

</html>