GMRequireChecker

Require this script and you will get variable GMRequireChecker equals to true if loaded. In other cases, variable GMRequireChecker will just not exists.

This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/429557/951692/GMRequireChecker.js 

// ==UserScript==
// @name         GMRequireChecker
// @namespace    GMRequireChecker
// @version      0.1
// @description  Require this script and you will get variable GMRequireChecker equals to true if loaded. In other cases, variable GMRequireChecker will just not exists.
// @author       PY-DNG
// @match        *
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// ==/UserScript==

const GMRequiredJSLoaded = true;