jsdom.env not working on node.js C9

As mentioned above, .env() is deprecated.
Use the following:

const { window } = new JSDOM(``, { runScripts: "dangerously" });
const myLibrary = fs.readFileSync("../../whatever.js", { encoding: "utf-8" });

const scriptEl = window.document.createElement("script");
scriptEl.textContent = myLibrary;
window.document.body.appendChild(scriptEl);

In regard to the answer above, and from the jsdom docs:
Don't stuff jsdom globals onto the Node global

A common antipattern we see when people use jsdom is copying globals from a jsdom window onto the Node.js global, and then trying to run the code---intended for a browser---inside Node.js. This is very bad and you should not do it. It runs code intended for the web browser in some kind of hybrid franken-environment polluted with a ton of globals that don't make sense there, and loses all benefits of isolating your code into a jsdom window.

https://github.com/jsdom/jsdom/wiki/Don%27t-stuff-jsdom-globals-onto-the-Node-global

I was facing the same issue. Was looking for the solution all over the web. It turned out that jsdom has updated some of their features since v10. So, I wanted to use jQuery in the Node.js end of an express app. For those who are just looking for answers about how to include jQuery in Node, I would like to mention that you'll need to install jsdom using npm install jsdom and jQuery using npm install jquery. Then:

For jQuery to work in Node, a window with a document is required. Since no such window exists natively in Node, one can be mocked by jsdom as below:

var jsdom = require('jsdom');
const { JSDOM } = jsdom;
const { window } = new JSDOM();
const { document } = (new JSDOM('')).window;
global.document = document;

var $ = jQuery = require('jquery')(window);

.env() is deprecated since v10. Hope this helps you or anyone who has been facing these types of issues.

Step 1: npm install jquery

Step 2: npm install jsdom

<!-- language: lang-js -->
    //add dummy function to test jquery in Node
    function fn1( value ){ console.log( "fn1 says " + value );}  
function fn2( value ) {console.log( "fn2 says " + value ); return false;}
    var jsdom = require('jsdom');
    const { JSDOM } = jsdom;
    const { window } = new JSDOM();
    const { document } = (new JSDOM('')).window;
    //comment out the line below it create problem
    //global.document = document;
    var $ = jQuery = require('jquery')(window);
    var callbacks = $.Callbacks();
    callbacks.add(fn1);
    callbacks.fire("foo!");
    callbacks.add( fn2 ); 
    callbacks.fire( "fool!" );