prototype(原型)属性

2017-06-21 11:03:00
admin
原创
555
<!DOCTYPE html>
<html>
<head>
    <title>Prototype Pattern Example</title>
    <script type="text/javascript">
    
        function Person(){
        }
        
        Person.prototype.name = "Nicholas";
        Person.prototype.age = 29;
        Person.prototype.job = "Software Engineer";
        Person.prototype.sayName = function(){
            alert(this.name);
        };
        
        var person1 = new Person();
        person1.sayName();   //"Nicholas"
        
        var person2 = new Person();
        person2.sayName();   //"Nicholas"
      
        alert(person1.sayName == person2.sayName);  //true
        
        alert(Person.prototype.isPrototypeOf(person1));  //true
        alert(Person.prototype.isPrototypeOf(person2));  //true
        
        //only works if Object.getPrototypeOf() is available
        if (Object.getPrototypeOf){
            alert(Object.getPrototypeOf(person1) == Person.prototype);  //true
            alert(Object.getPrototypeOf(person1).name);  //"Nicholas"
        }
        
    </script>
</head>
<body>

</body>
</html>
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