我可以在CSS中一起使用DIV类和ID吗？ [英] Can I use DIV class and ID together in CSS?

问题描述

我可以在CSS中一起使用DIV类和ID吗？
例如：

 < div class =xid =y> 
  -  
< / div> 
  

解决方案

是的，可以。

  #yx {
 / *将选择id =y的元素，也具有class =x* / 
} 
  

同样地：

  .x＃y {
 / *将选择同样具有id =y的元素class =x* / 
} 
  id 在文档中是唯一的。但是，如果您使用类进行用户互动，则 有用。
 
Can I use DIV Class and ID together in CSS?
For example:
<div class="x" id="y">
    --
</div>

解决方案
Yes, yes you can.
#y.x {
 /* will select element of id="y" that also has class="x" */
}
Similarly:
.x#y {
 /* will select elements of class="x" that also have an id="y" */
}
Incidentally this might be useful in some use cases (wherein classes are used to represent some form of event or interaction), but for the most part it's not necessarily that useful, since ids are unique in the document anyway. But if you're using classes for user-interaction then it can be useful to know.

                        
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