JSFiddle - React, Tailwind, and code Playground

HTML

<li >
     <a data-toggle="one" href="#one" aria-expanded="false" aria-controls="one" class="">
               ...
     </a>
</li>
<li >
     <a data-toggle="one" href="#one" aria-expanded="true" aria-controls="one" class="">
               ...
     </a>
</li>

CSS

a[aria-expanded="true"]{
  background-color: #dae1f3; 
}