jQuery plugin says "jQuery is not defined"

I have run the following command line arguments: npm install --save jquery npm install --save jquery-slimscroll

Inside of my index.js file, the first three lines import these modules:

import $ from 'jquery';
window.jQuery = $;
import 'jquery-slimscroll';

But I receive the following error:

jquery.slimscroll.js:474 Uncaught ReferenceError: jQuery is not defined

Any suggestions?

[cloudmu]

require('jquery-slimscroll');

instead of

import 'jquery-slimscroll';

[cloudmu]

import jquery from 'jquery';
window.$ = window.jQuery=jquery;