JSFiddle - React, Tailwind, and code Playground

HTML

<div id="texty" onmouseover="if (document.getElementById('texty').innerHTML!='[email protected]') {document.getElementById('texty').innerHTML='[email protected]'} else {document.getElementById('texty').innerHTML='8 912 77 20 444'}" onmouseout="if (document.getElementById('texty').innerHTML!='8 912 77 20 444') {document.getElementById('texty').innerHTML='8 912 77 20 444'} else {document.getElementById('texty').innerHTML='[email protected]'}">[email protected]</div>