JavaScript prototype属性

The prototype property allows you to add properties and methods to an object.
prototype属性可为对象添加属性和方法

Syntax
语法

object.prototype.name=value 

 

 

Example 1
举例 1

In this example we will show how to use the prototype property to add a property to an object:
在这个举例中我们将展示如何使用 prototype属性来为对象添加属性

 

<script type="text/javascript">
        function employee(name,jobtitle,born) 
{                                  
        this.name=namethis.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> 

 

 

The output of the code above will be:
输出结果为：

 

20000