"Unexpected token import" error with Angular4 + Universal + ng-bootstrap

For those trying to understand what the solution is, you basically want to use and whitelist angular2-toaster and other modules giving this issue.

1. if using angular-cli, use ng eject to create a webpack.config.js

2. install the webpack-node-externals dependency via npm install and add the following lines in the webpack.config.js file

   const nodeExternals = require('webpack-node-externals');
   
   module.exports = {
     ...
     target: 'node',
     externals: [nodeExternals({
       whitelist: [
         /^@ng-bootstrap\/ng-bootstrap/,
         /^angular2\-toaster/,
       ]
     })],
     ...
   }