JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-2.2.3.min.js"></script>
<div id='saurabh'class='byline'>
  <div>some excerpt</div>
  geplaatst door
  <span class="name">Author's name</span>
 <span id='sam' class='boy'>May, 2015</span>
</div>

JavaScript

$(function() {
var afdgfxhgfhhg = 'May';
var str ='sam';
var elem = $("#saurabh:contains("+afdgfxhgfhhg+")");
console.log('elem '+elem.html());
  var new_html = elem.html().replace(/May/g,str);
  elem.html(new_html);
});