JSFiddle - React, Tailwind, and code Playground

HTML

<p class="teste">
    <a href="#">Meu texto</a><br />
    <a href="#">1</a>
</p>

CSS

a { color: red; }
.classeCss { color: pink; }

JavaScript

$("a").each(function() {
    if ($.isNumeric($(this).html()))
        $(this).addClass("classeCss");
});