JSFiddle - React, Tailwind, and code Playground
HTML
<a href="" class="test">HELLO</a>
JavaScript
var test = window.location.pathname;
var target = test.replace(/\/$/, '');
var rest = target.substring(0, target.lastIndexOf("/") + 1);
var last = target.substring(target.lastIndexOf("/") + 1, target.length);
alert(rest);
alert(last);
$(".test").attr("href", rest)