JSFiddle - React, Tailwind, and code Playground
HTML
<p id="element1">aaaaaa/cat/bbbbbb</p>
JavaScript
var strMessage1 = document.getElementById("element1") ;
strMessage1.innerHTML = strMessage1.innerHTML.replace( /aaaaaa./g,'<a href=\"http://www.google.com/').replace( /.bbbbbb/g,'/world\">Helloworld</a>') ;