Web Dev Roadmap for Beginners (Free!): https://bit.ly/DaveGrayWebDevRoadmap What is middleware in Express JS? You will learn the answer in this Node.js & Express tutorial for Beginners. Error handler and logger custom middleware, built-in middleware and third party middleware will all be applied in this lesson for beginners. 🚩 Subscribe ➜ https://bit.ly/3nGHmNn 🚀 This lesson is part of an Node.js & Express for Beginners tutorial series playlist:    • Node.js Tutorials for Beginners   🔗 Starter Source Code: https://github.com/gitdagray/express_intro What is Middleware in Express JS? | Node.js Tutorials for Beginners (00:00) Intro (00:05) Welcome (00:15) Intro and Setup (00:33) What is middleware? (01:37) Applying built-in middleware (07:03) Creating custom middleware (14:49) Adding third party middleware (23:00) Creating a custom error handler (30:43) app.use() vs app.all() (32:03) Improving the custom 404 route handler 📚 References: Node.js Official site: https://nodejs.org/ NPM Official site: https://www.npmjs.com/ Express JS Official site: https://expressjs.com/ MDN CORS: https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS NPM CORS: https://www.npmjs.com/package/cors ✅ Follow Me: Twitter: https://twitter.com/yesdavidgray LinkedIn: https://www.linkedin.com/in/davidagray/ Blog: https://yesdavidgray.com/ Reddit: https://www.reddit.com/user/DaveOnEleven Was this tutorial about middleware in Express JS helpful? If so, please share. Let me know your thoughts in the comments. #express #middleware #beginners