JSFiddle - React, Tailwind, and code Playground

HTML

<div class="test">
text text text
 <a href="#">text</a>
 <a href="#">text</a>
</div>

CSS

.test p{
    font-size:1.5em;
    color:red;
}

JavaScript

var text = document.querySelector('.test').firstChild;
var b = document.createElement('B');
text.parentNode.insertBefore(b, text);
b.appendChild(text);