JSFiddle - React, Tailwind, and code Playground

by skram

HTML

<div class="category-info">
    <p>text 1</p><hr><p>text 2</p>   
</div>

CSS

.news-part { color: blue; }

JavaScript

var str = $('.category-info').html();
str = str.split('<hr>');

$('.category-info').html(str[0] + '<div class="news-part">' + str[1] + '</div>');