JSFiddle - React, Tailwind, and code Playground

HTML

<li>
<a class="blogCategoriasItens removeComma" href="/busca?busca=tagss">tagss, </a>

<a class="blogCategoriasItens removeComma" href="/busca?busca= tagteste1"> tagteste1, </a>

</li>

JavaScript

$('.removeComma:last').html(function () {
    var string = $(this).text();
    string = string.replace(/\s+/g, '').replace(/,+$/, "");
    $(this).text(string)
});