当前位置: 首页 > 网络学院 > 客户端脚本教程 > JavaScript > JavaScript constructor 属性

JavaScript
JS 字符串
JS Date
JS数组,JS Array
JS Boolean
JS Math
JS HTML DOM
JS Browser
JS Cookies
JS 校验
JS Animation
JS Image Maps
JS Timing
JS 建立对象
JS 摘要
JS 实例
JS 对象实例
JS DOM 实例
JS数组对象参考
JS布尔对象参考
JS日期对象参考

No. « 1 2 3 »

学院文章搜索

关键字

JavaScript constructor 属性

出处:互联网   整理: 软晨网（RuanChen.com）   发布: 2009-03-04   浏览: 409 ::
收藏到网摘: n/a

Definition and Usage
定义与用法

The constructor property is a reference to the function that created an object.
constructor属性是创建对象的参考

Syntax
语法

object.constructor

Example 1
实例1

In this example we will show how to use the constructor property:
在本例中，我们将演示如何应用constructor属性：

<script type="text/javascript">
var test=new String()
if (test.constructor==Array)
{document.write("This is an Array")}
if (test.constructor==Boolean)
{document.write("This is a Boolean")}
if (test.constructor==Date)
{document.write("This is a Date")}
if (test.constructor==String)
{document.write("This is a String")}
</script>

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

This is a String

Example 2
实例2

In this example we will show how to use the constructor property:
在本例中，我们将演示如何应用constructor属性：

<script type="text/javascript">
function employee(name,jobtitle,born)
{
this.name=name
this.jobtitle=jobtitle 
this.born=born
}
var fred=new employee("Fred Flintstone","Caveman",1970)
document.write(fred.constructor)
</script>

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

function employee(name, jobtitle, born)
{this.name = name; this.jobtitle = jobtitle; this.born = born;}

Try-It-Yourself Demos
互动演练

constructor - example 1
In this example we will show how to use the constructor property.
在本例中我们将演示如何应用constructor属性

constructor - example 2
In this example we will show how to use the constructor property.
在本例中我们将演示如何应用constructor属性

评论 (0) All

登陆 | 还没注册？