javascript 对象定义模式

2014-09-30 15:38:00 by dragondjf

1.构造函数原型模式

    function Book(title, pages){
        this.title = title;
        this.pages = pages;
    }

    Book.prototype.what = function(){
        console.log(this.title + this.pages);
    }

    var book1 = new Book("javscript 高级编程", 200);
    var book2 = new Book("Qt 高级编程", 200);

    book1.what();
    book2.what();

这种模式是ECMAScript 定义类的标准模式，使用最为广泛。

2. 动态原型模式

    function Book(title, pages){
        this.title = title;
        this.pages = pages;

        if (typeof Book.isLock == "undefined"){
            Book.prototype.what = function(){
                console.log(this.title + this.pages);
            };
            Book.isLock = true;
        }

    }

    var book1 = new Book("javscript 高级编程", 200);
    var book2 = new Book("Qt 高级编程", 200);

    book1.what();
    book2.what();