MERN project - To do app

Create react app named client in the root project folder using create-react-app command

npx create-react-app client

Install modules in the api folder(npm init - first thing to do)

npm install express mongoose cors

app.use()

• The app.use() function adds a new middleware to the app.

app.use(express.json());

• express.json() is a built in middleware function in Express starting from v4.16.0. It parses incoming JSON requests and puts the parsed data in req.body.

npm i -D nodemon

• -D is a development dependency

Change a script already written in package.json

• “start”: “nodemon server.js”

cors (Cross Origin Resource Sharing)

• Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources.