js原生设计模式——2面向对象编程之继承—new+call(this)组合式继承

时间:2021-10-22 23:35:22

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>groupInherit</title>
    <script type="text/javascript">
    //声明父类
    function superClass(name){
        this.name = name;
        this.books = ['html','css','js'];
    }
    superClass.prototype.getName = function(){
        console.log(this.name);
    }
    superClass.prototype.getBooks = function(){
        console.log(this.books);
    }
    //声明子类
    function subClass(name,time){
        superClass.call(this,name);//让子this指向父this,后面带的是父类需传入的参数name
        this.time = time;
    }
    subClass.prototype = new superClass();//类式继承
    subClass.prototype.getTime = function(){
        console.log(this.time);
    }
    //测试用例:实例化对象测试
    var test1 = new subClass('js book',2015);
    var test2 = new subClass('css book',2014);
    test1.books.push('php');//test2插入的数据'php'不影响test1

console.log(test1.name);      //'js book'
    console.log(test1.books);   //["html", "css", "js", "php"]
    test1.getName();              //'js book'
    test1.getBooks();           //["html", "css", "js", "php"]
    test1.getTime();            //2015

console.log(test2.name);      //'css book'
    console.log(test2.books);   //["html", "css", "js"]
    test2.getName();              //'css book'
    test2.getBooks();           //["html", "css", "js"]
    test2.getTime();            //2014

//本例已经通过验证,this属性和原型方法均能访问
    </script>
</head>
<body>
    
</body>
</html>