how to apply two css class to one element code example

Example 1: css multiple classes

//HTML Code
<div class = 'firstClass secondClass'></div>

//CSS Code
.firstClass.secondClass {
  
}

Example 2: more than one class in div

<!-- You can use multiple classes per element if you simply put spaces between the names: -->

<div class="c1 c2"> This div has two classes </div>