Javascript中引用示例介绍

复制代码 代码如下:

<script language="javascript">
/https://img.qb5200.com/download-x/dosomething1,对于引用，变量本身不可以修改，但变量内部结构可以修改
function dosomething1(a){
a = 'try';
}

//测试1
function test1(){
var a = {a:'test',b:'is',c:'ok'};
dosomething1(a);
alert(a.a);
}
/https://img.qb5200.com/download-x/dosomething2
function dosomething2(v){
v.a = v.a + '!!!'; //修改引用变量的属性，修改成功
v = 'try'; //试图修改变量引用，修改失败
}
//测试2
function test2(a){
var a = {a:'test',b:'is',c:'ok'};
dosomething2(a);
alert(a.a);
}
test2();
</script>