JSFiddle - React, Tailwind, and code Playground

HTML

<p>
I bought some apples.
</p>

<p>
<a href="oranges.html">I bought some oranges.</a>
</p>

<p>
I bought some pears.
</p>

JavaScript

var regex = /(apples|oranges)/g;

$('*').each(function() {
    var $this = $(this);
    var text = $this.text();
    if (regex.test(text)) {
        $this.html(
            $this.html().replace(regex, '</a><span style="background: #fa7373;">$1</span>')
        );
    }
});