Start at https://kit.svelte.dev/
This example came from this stackoverflow posting, user Nikolas Blahušiak
It was inspired by this youtube video
https://www.youtube.com/watch?v=P6gEnVlJPOc
Fullstack SvelteKit ToDo App with TailWind CSS and MongoDB
Mar 20, 2021 Brayden Girard (46:13)
A few modifications have been made to the code. A few console.log() entries. Some mods made to /profile/index.svelte to make things look better.
You can get a glimpse on how to integrate to a MongoDB, and how to use hooks.
I was surprised how many times those console.logs hit the server.
I'm also very surprised as to how many db connections there are in place from a single application running on my local host.
Note: you will need to create an account at mongodb.com, sign up for a free test tier server, and enter your credentials in the file: /config/default.json
Note: Many thanks to Nikolas Blahušiak for the original work here.