JSFiddle - React, Tailwind, and code Playground

HTML

<input type="button" value="Test" id="button" />
<pre id="output"></pre>

JavaScript

$('#button').click(function() {
 path = "controller/action,/param";
 var result = path.replace(/[^a-zA-Z0-9_\x7f-\xff]*/g, "_");
 $('#output').text(result);
});