ES6 shorthand import

You can use it like this:

import * as chai from 'chai';

let assert = chai.assert;
let should = chai.should();
let expect = chai.expect;

Yes, you can do it like:

import { assert } from 'chai';

assert must be exporting from chai in that case. See spec here and about es6 modules here

I'd rather:

import {assert, should, expect}  from 'chai';