Home > Article > Web Front-end > The difference between $("#") and $("#"+xx) in jquery
This article will introduce to you the difference between $("#") and $("#" xx) in jquery. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.
Recommended tutorial: jQuery tutorial
$("#") and $("#" in jquery xx )
$("#") means that the selector selects elements with id, for example You can use $("#id").val() to get the corresponding data value. If there is a plus sign in it, there is usually a variable, which is commonly used when encapsulating functions.
For example: The following small demo
<script src="jquery-1.8.3.js"></script> <body> <input type="text" value="a1" id="a1"><br/> <input type="text" value="a2" id="a2"><br/> <input type="text" value="a3" id="a3"><br/> <input type="text" value="a4" id="a4"><br/> <input type="text" value="a5" id="a5"><br/> <input type="button" value="点击测试" οnclick="test_()"> </body> <script> function test_() { var a1=$("#a1").val(); alert(a1); for(var i=1;i<=5;i++) { //这里+只是一个连接的作用,总得来说就是jquery的选择器,没有区别的说法 var a=$("#a"+i).val(); alert(a); } } </script> </html>
The + here is just a connection function. Generally speaking, it is the selector of jquery. There is no difference.
More For more programming related knowledge, please visit: Programming Teaching! !
The above is the detailed content of The difference between $("#") and $("#"+xx) in jquery. For more information, please follow other related articles on the PHP Chinese website!