Express.js Learning Notes

Node Learning Notes.md

Express.js Learning Notes

Tips

• Always refer to http://expressjs.com/api.html

• Everything is “middleware”.

• use means “Run this on ALL requests”

• get means “Run this on a GET request, for the given URL”

• in between middleware should return next() or res.end()

• Ends the response process.

    res.render('/homepage');
    res.send('Hello World!');
    res.json({});
    res.end();
    res.status(404).end();
  

• middleware and async are different

• always chain middleware

• use async inside middleware

• use async when handling a request, and especially when that involves doing file I/O or talking to a database.

Reference

• http://www.pseudobry.com/let-express-js-and-async-js-make-your-life-easier/