JSFiddle - React, Tailwind, and code Playground

HTML

<div class="titre"> xxxxx </div>
<div class="media"> </div>

<div class="titre"> xxxxx </div>
<div class="media"> </div>

JavaScript

$('.titre').click(function(){
    $(this).next('.media').css('color', 'red');
    console.log($(this).next('.media'));
});