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Building Full-Stack Web Applications With Node.js and React

Express Route Handlers

Explore how to create and use Express route handlers to manage various HTTP requests in a Node.js server environment. Understand how routes define endpoints and handle logic for different actions like retrieving, updating, and deleting data. This lesson builds your skills to structure back-end routes essential for full-stack web applications.

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In the previous lesson, we wrote the minimum code necessary to run the server and then accessed it through the browser.

Routes

Every application is usually divided into a bunch of routes. Any page or request we invoke on a website is hitting a specific route on the back-end server. Routes determine how each endpoint should be treated and what logic gets executed.

Each HTTP request type is mapped to a routing method in Express with the syntax app.method(path, callback).

Route methods

The path defines the endpoint or the route path, for example, the / root endpoint. After defining the endpoint, we then perform the matched callback function. Here’s a list of the most common route methods:

  • The get request handler is used to retrieve resources from the server.
  • The put request handleris used for creating and updating the data in the server.
  • The post request handler is used to create and update the data in the server. The basic difference between putand post methods is that post is used to
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