LABORATORY-NEXTJS-SWR

This project is a laboratory for testing swr on Next.js. With SWR, components will get a stream of data updates constantly and automatically. And the UI will be always fast and reactive.

I wanted to create this example since the mutation principle is not that easy to understand at first. Data need to be updated on the backend and in the cache or else the information shown on the screen become invalidated.

I tried to show how to do since the official documentation on vercel does not explain it in details.

Plan of the presentation

I explain with all the details how I build the project and my way of working.

• Infrastructure
• Organization
• Running
• Links

Infrastructure

The Infrastructure of this project is composed of 4 services :

• Mongodb: The database where the information will be saved
• Frontend: The Next.js application where I will be using swr
• Backend: A simple Express application
• Nginx: Using the jwilder image for creating a reverse proxy based on the services

Organization

Organization of the global folder

Folder's Name	Description of the folder
backend	The express application
frontend	The Next.js application
mongodb	The database
nginx	The reverse proxy handler

Organization of the backend folder

Folder's Name	Description of the folder
dbs	Regroup the direct call to the database
env	Regroup the environment files
models	Regroup the models
routes	Regroup the routes for the rest API

Organization of the frontend folder

Folder's Name	Description of the folder
pages	Regroup the pages which create the routing
services	Regroup the calls to the backend
styles	Regroup the CSS styles of the frontend

Organization of the mongodb folder

Folder's Name	Description of the folder
data	Created automatically, the data of the backend
init	The scripts that will create the auth user

Organization of the nginx folder

Folder's Name	Description of the folder
conf.d	Created automatically, the reverse proxy configuration

Running

You can run or stop the application with one command :

$ npm run start
$ npm run stop

You can then visit the following url in your browser : http://frontend.net/ In case, it does not work, you might need to modify your /etc/hosts and add the following line :

127.0.0.1 frontend.net backend.net

Links

• Official swr documentation