Essential Middleware

Common Express Middleware

• body-parser: parses request bodies for POST parameters.

  • const bodyParser = require('body-parser');
    app.use(bodyParser.json());

    • builtin express.json() will work for most cases, bodyParser works when raw json text in postman with single quotes while express.json wont

• cookie-parser: Used to parse the cookie header and populate req.cookies (essentially provides a convenient method for accessing cookie information).

  • const cookieParser = require("cookie-parser");
    app.use(cookieParser());

• cors: Enable cross origin stuff globally

  • const cors = require("cors");
    app.use(cors());

• morgan: An HTTP request logger middleware for node.

  • app.use(morgan('dev'))
    //=> GET / 200 17.199 ms - -

• serve-favicon: Node middleware for serving a favicon (this is the icon used to represent the site inside the browser tab, bookmarks, etc.).