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    以下代码为变量 car 设置值为 "Fiat" :

    var car = "Fiat";

    对象也是一个变量,但对象可以包含多个值(多个变量)。

    var car = {type:"Fiat", model:500, color:"white"};

    在以上实例中,3 个值 ("Fiat", 500, "white") 赋予变量 car。

    在以上实例中,3 个变量 (type, model, color) 赋予变量 car。

    Note JavaScript 对象是变量的容器

     prototype 属性


    定义和用法

    prototype 属性允许您向对象添加属性和方法

    注意: Prototype 是全局属性,适用于所有的Javascript对象。

    语法

    object.prototype.name=value

     

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    <script>
            function employee(name, jobtitle, born) {
                this.name = name;
                this.jobtitle = jobtitle;
                this.born = born;
            }
            var fred = new employee("Fred Flintstone", "Caveman", 1970);
     
            employee.prototype.salary = null;
     
            fred.salary = 20000;
     
            document.write(fred.salary);
        </script>

     

     

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    function Person(name) {
        var _this = {};
        _this._name = name;
     
        _this.sayHello = function() {
            alert("P_hello" + _this._name);
        }
        return _this;
    }
     
    function Teacher(name) {
        // body...
        var _this = Person(name);
        var superSay = _this.sayHello;
        _this.sayHello = function(argument) {
            superSay.call(_this);
            alert("T_hello" + _this._name);
        }
        return _this;
    }
     
    var t = Teacher("aaaa");
    //console.log(t);
    t.sayHello();

     


     
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  • 原文地址:https://www.cnblogs.com/tangge/p/5708128.html
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