JSFiddle - React, Tailwind, and code Playground
HTML
<a href='blablabla' class='tags'>tagSYS, </a>
<a href='blablabla' class='tags'>tagSYS, </a>
<a href='blablabla' class='tags'>tagSYS, </a>
<a href='blablabla' class='tags'>tagSYS, </a>
JavaScript
$('.tags:last').html(function () {
var string = $(this).text();
string = string.replace(' ', '').replace(/,+$/, "");
$(this).text(string)
});