Question: I have installed via npm jquery and jstree.

In my file I have imports for both:

```
import $ from 'jquery';
import jstree from 'jstree';

```

While $ is found the reference to $.jstree is not. ¿Any clues?

Answer: 
Being a react project I had to include in my index.html the scripts manually and then, inside the module, reference $ as: 

```
var $ = window.$;

```
It's an ugly hack, but I finally got it to work by just copying `jstree.js` from `node_modules` to a `libs` subdirectory in my `src` directory, and importing it as:

`import './libs/jstree';`