JSFiddle - React, Tailwind, and code Playground

by DupontTD

HTML

<p class="premier">Para 1</p>
    <p><em>second </em> Para 2</p>
    <p id="dernier"> dernier Para</p>
    <!-- je suis un commentaire -->

CSS

.find{
  color : white;
  background-color : green;
}

JavaScript

function find(node, string) {
    if (node.nodeType == document.ELEMENT_NODE) {
       for (var i = 0; i < node.childNodes.length; i++) {
          if (find(node.childNodes[i], string))
             return true;
          }
          return false;
    } else if (node.nodeType == document.TEXT_NODE) {
       if (node.nodeValue.indexOf(string) > -1) {
         return true;
       }
        return false;
    }
}

if (find(document.body, "P"))  
   document.body.classList.add('find');