If you want users to retrieve the js/css files from a CDN, you need to include these files in your index.html. Example with momentjs (Note: this is just an example, momentjs can be installed via npm in your project)
index.html
<!-- get script from CDN -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js" />
Then, to use the the script in your component, you need to manually declare the exported variables / functions to avoid TS compilation errors
component.ts
declare let moment: any; //declare moment
//use moment
moment().format(....);
Note: some libraries have types that you can use instead, instead of using any
. You can get these types from the @types repository
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