Express JS Fast Learn for Beginner

Set up a simple web server in node.js with the express framework, creating an app.js that listens on port 3000. Install express, initialize package.json, and run the server.

Learn to build basic routing with Express by defining routes with app.get for / and /person, serve text or JSON, run on localhost:3000, and use nodemon for auto reload.

Learn to implement the post method in express by defining app.post for /person, parsing JSON with express.json, and testing with insomnia to send and log data.

Learn how to define routes with parameters in Express, using /person/:id, access them via request.params, and return json responses reflecting the parameters.

Learn how to use query parameters in Express: format with ?name=John&age=30, access via req.query, respond with JSON, and why not to send sensitive data in URLs.

Explore put and delete methods in Express.js, updating and deleting data via request params and body, and review CRUD operations alongside get and post.

Learn how to use the res.download method to prompt file downloads from an Express server. See examples with images and videos in subfolders and test routes like /download.

Learn how to use the Express redirect method (res.redirect) to send users to external sites like google.com or internal routes with query parameters, handling http and https correctly.

Learn to render HTML in an Express app using the EJS templating language by setting the view engine, creating a views folder, and rendering hello.ejs at /hello.

Learn to serve static files with Express using app.use and express.static, placing assets in a public folder so HTML, CSS, images, and PDFs open in the browser.

Create a test route in Express that returns specific http status codes. Demonstrate codes like 200, 201, 400, 401, 404, and 500 with friendly messages.

Discover how Express middleware functions sit between the request and response and use next to pass control. Learn about route-level and application-level middleware and data attached to the request object.