在JQuery中连接两个字符串(concat two strings in JQuery)

 就像上面的标题：如何在JQuery中连接两个字符串？ 
 
 这是我迄今为止的代码： 
 
$(document).ready(function(){           
    serviceName = '<?=$_GET['services'] . ".php";?>';
    serviceID='<?= "#" .$_GET['services'];?>';
    serviceClass = '<?=$_GET['services'];?>';

    if (serviceName != "") {
        alert(serviceID);
        $('.main_content').load(serviceName);
        $(serviceID).addClass("it");
    }
});
 
 正如你在上面的代码中看到的那样，在变量名serviceID ，我将hashtag和我的GET值连接起来，并且试图将它放在ALERT上，并且结果是正确的，但是当我将它分配给.addClass它不起作用。 
 
 任何替代品和解决方案，非常感谢。 

Just like the title above: how to concatenate two strings in JQuery?
 
This is my code so far:
 
$(document).ready(function(){           
    serviceName = '<?=$_GET['services'] . ".php";?>';
    serviceID='<?= "#" .$_GET['services'];?>';
    serviceClass = '<?=$_GET['services'];?>';

    if (serviceName != "") {
        alert(serviceID);
        $('.main_content').load(serviceName);
        $(serviceID).addClass("it");
    }
});
 
As you can see in my above code, in variable name serviceID, I am concatenating hashtag and my GET value and I try to put it on ALERT and the result is correct, but when I assign it to .addClass it’s not working.
 
Any alternatives and solution is much appreciated.

原文：https://stackoverflow.com/questions/23361027