This a standard userscript with javascript code
// ==UserScript==
// @name Example JS Userscript
// @description This a standard userscript with javascript code
// @match https://github.com/quoid/userscripts
// @exclude-match: *://*.*
// @version 1.1
// @grant GM.setValue
// @grant GM.getValue
// @require https://code.jquery.com/jquery-1.12.4.min.js
// @namespace https://greasyfork.org/users/1323231
// ==/UserScript==
console.log("I was updated!");