Applying Multiple CSS Classes to a Single Element
Can multiple CSS classes be applied to a single HTML element? For example, consider the following code:
<a class="c1">aa</a>
In this case, the c2 class seems to be ignored. How can both classes be applied simultaneously?
Solution:
There are two ways to achieve this:
1. Multiple Classes in the Class Attribute
Separate the classes using whitespace, for example:
<a class="c1 c2">aa</a>
2. Class Intersection Selector (No Whitespace)
To specify that an HTML element must contain all of the specified classes, use a CSS selector without any space:
.c1.c2 { /* Styles */ }
Using this selector, the element will only be styled if it has both the c1 and c2 classes.
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