JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/eu81273/jsfiddle-console/master/console.js"></script>

JavaScript

var groups = [];
groups.push("CN=HR,OU=STAFF,DC=Company,DC=fr");
groups.push("CN=IT,OU=STAFF,DC=Company,DC=fr");
console.log(groups.length);
for (var i = 0; i < groups.length; i++) {
  var g = groups[i];
  if (g.indexOf("STAFF") < 0) {
    continue;
  }
  // g = g.substring(0, g.indexOf("OU=groupesstructurels"));
  g = g.replace(/(CN=)|(,.*$)/ig, "");
  console.log(g);
}