JavaScript constructor 属性
JavaScript Array 对象参考手册定义和用法
constructor 属性返回对创建此对象的数组函数的引用。
语法
object.constructor
实例
例子 1
在本例中，我们将展示如何使用 constructor 属性：
<script type="text/javascript">
var test=new Array();
if (
{
document.write("This is an Array");
}
if (
{
document.write("This is a Boolean");
}
if (
{
document.write("This is a Date");
}
if (
{
document.write("This is a String");
}
</script>
var test=new Array();
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>
输出：
This is an Array
例子 2
在本例中，我们将展示如何使用 constructor 属性：
<script type="text/javascript">
function employee(name,job,born)
{
this.name=name;
this.job=job;
this.born=born;
}
var bill=new employee("Bill Gates","Engineer",1985);
document.write(
</script>
function employee(name,job,born)
{
this.name=name;
this.job=job;
this.born=born;
}
var bill=new employee("Bill Gates","Engineer",1985);
document.write(
bill.constructor);</script>
输出：
function employee(name, jobtitle, born)
{this.name = name; this.jobtitle = job; this.born = born;}
{this.name = name; this.jobtitle = job; this.born = born;}
实例
constructor
在本例中，我们将展示如何使用 constructor 属性。