Adding external libraries in this configuration means simply adding another <script> entry to your file and setting the source attribute to the respective link. If we wanted to add moment.js, we look for the library in the same way as explained before and we add the following snippet to our page:
<script src="https://somecdn.com/moment.js/X.X.X/moment.js "></script>
Please note that you have to paste the link you found instead of the fake one mentioned in the preceding snippet.
