JSFiddle - React, Tailwind, and code Playground

HTML

<p class="comment">Lorem ipsum dolor sit amet ipsum dolor sit amet...</p>
<p class="comment">Lorem ipsum dolor sit amet ipsum dolor sit amet...</p>
<p class="comment">Lorem ipsum dolor sit amet ipsum dolor sit amet...</p>

JavaScript

jQuery(document).ready(function($){
    $(".comment").each(function(){
	        if ($(this).text().length > 30) {
	            $(this).text($(this).text().substr(0, 27));
	            $(this).append('...');
	        }
	    });
});