JSFiddle - React, Tailwind, and code Playground

HTML

<div class="search_box"></div>
<button>Add Class</button>

CSS

.search_box:after {
     content: 'Contents of the after pseudo element';   
}
.search_box.hidden:after {
    display: none;
}

JavaScript

$('button').on('click', function() {
    $('.search_box').addClass('hidden');
});