JavaScript constructor 属性
定义和用法
constructor 属性返回对创建此对象的 Boolean 函数的引用。
语法
object.constructor
实例
在本例中,我们将展示如何使用 constructor 属性:
<script type="text/javascript">
var test=new Boolean();
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 Boolean();
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 a Boolean
实例
constructor
在本例中,我们将展示如何使用 constructor 属性。