Yea, it's annyoing.
I should generate the d.ts of leaflet-draw.
First it complains about window and document not being defined.
Great, because leaflet is not a nodejs module, and browser-only libraries are so rare, especially with JS.

Another great thing is, I now declare

var window = window || {};
var document = document || {};

on top of the file, and now it complains about Leaflet not being defined.
Then I define it
var L = L || {};

and now it complains about L.drawLocal.extend

Cannot read property "extend" of undefined.

Sure a "very" utilizable tool.

It's a good thing after all, that the files in DefinitelyTyped are not up-to-date, so TypeScript becomes an unproductivity tool. The rod between the wheels, so to say.

And cool, now I finally got it to work:
npm install -g leaflet

edit leaflet and leaflet-draw to have this on the top,
path of leatlet is as per error message in /root/.nvm/versions/node/v14.3.0/lib/node_modules/leaflet/dist/leaflet-src.js

const Window = require('window');
const window = new Window();
const navigator = require('navigator');

const { JSDOM } = require('jsdom');
const DEFAULT_HTML = '<html><body></body></html>';
const jsdom = new JSDOM(DEFAULT_HTML, {
    url: "https://www.bbc.co.uk",
    referrer: "https://www.bbc.co.uk",
    contentType: "text/html",
    userAgent: "node.js",
    includeNodeLocations: true
});
const document = jsdom.window.document;
const L= require('leaflet'); // in leaflet-draw only.

dts-gen --expression-file ./leaflet.draw-src.js

and we now have the "resounding" victory of a file "leaflet_draw_src.d.ts" generated, with content


/** Declaration file generated by dts-gen */

declare const leaflet_draw_src: any;

Ahahaha.
It would be funny, if I wouldn't need it.

Uh oh!

Could you add the ability to dts-gen individual files #58

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