JSFiddle - React, Tailwind, and code Playground

JavaScript

// ==UserScript==
// @name        _Starter AJAX request in GM, TM, etc.
// @match       *://php.net/*
// @grant       GM_xmlhttpRequest
// @connect     php.net
// ==/UserScript==

GM_xmlhttpRequest ( {
    method:     'GET',
    url:        'http://php.net/',
    onload:     function (responseDetails) {
                    // DO ALL RESPONSE PROCESSING HERE...
      							alert(responseDetails);
                    console.log (
                        "GM_xmlhttpRequest() response is:\n",
                        responseDetails.responseText.substring (0, 80) + '...'
                    );
                }
} );