Building ApplicationsLesson 42Free preview

Express.js

This lesson is part of Node.js · All levels

Summary

Express is a lightweight framework on top of the http module that facilitates route mapping, request handling, and middleware use. You can create REST API with just a few lines of code. Features such as modular routers and template engines make Express relevant for small and large projects.

Key points

Express is made with express() and then heard via app.listen
App.get, app.post, and others map HTTP methods to the handler
Put middleware on the entire route
Modular routers divide endpoints into different files

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