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Express Basics

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What is Express Middleware?

2:22 with Andrew Chalkley and Joel Kraft

You've already been using it, now learn what Express middleware is!

Documentation

Basic form of Express middleware

(req, res, next) => {
  // do something
  next();
}

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    We use the body parser to post incoming form data and 0:00
    the cookie parser to read cookie information. 0:03
    But that's not all you can do with Middleware. 0:07
    In fact, Middleware is so integral to Express, 0:09
    just about everything you write in Express is Middleware. 0:12
    So what is it? 0:15
    Consider when someone asks you a question, you hear the question, think about it for 0:16
    a moment, and then answer the question. 0:21
    If we relate this to the request response cycle, that middle step, 0:24
    the thinking, is analogous to what Middleware does. 0:28

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