JSFiddle - React, Tailwind, and code Playground

HTML

<a mce_style=''>Anchor Tag with mce_style attribute</a><br /><br />
<span mce_style=''>Span Tag with mce_style attribute</a><br /><br />
<a>Anchor Tag without mce_style attribute</a>

CSS

a[mce_style] { color : red; }