Prerendering#

You've already added the script to run pre-rendering of your application by executing the ng add @nguniversal/express-engine schematics. The problem is that it's not working with more sophisticated applications. Try to run it:

npm run prerender

As you can see, you've run into several issues. Some dependencies are missing in the Dependency Injection mechanism:

Terminate the rendering process.

The point is that the pre-rendering mechanism does not launch your application through the server.ts file; it does not even launch the server. Because of that, providers passed to the ngExpressEngine function are not applied. You need to provide them inside the src/app/app.server.module.ts file. Add the following imports statements at the top of this file:

import { REQUEST, RESPONSE } from '@nguniversal/express-engine/tokens';

import { dbClient } from '../../api';

And provide services and tokens that are missing: