Learn how to build a full-stack MERN app with React, Node, Express, MongoDB Atlas, and TypeScript. This course is beginner-friendly and teaches you everything you need to know along the way. Code for this course: https://github.com/codinginflow/MERN-course Deployment tutorial for this app: https://www.youtube.com/watch?v=svEs1TafR7E Sign up for Linode and get a $100 60day free credit for new Linode accounts: https://linode.com/codinginflow ⭐ Get my full-stack Next.js with Express & TypeScript course: https://codinginflow.com/nextjs ✅ Get my free React Best Practices course: https://www.codinginflow.com/reactbestpractices 💌 Join my newsletter for regular web dev tips: https://codinginflow.com/newsletter 💬 Join our developer community on Discord: https://codinginflow.com/discord 📣 Follow Coding in Flow on social media: Twitter: https://twitter.com/codinginflow Instagram: https://instagram.com/codinginflow TikTok: https://tiktok.com/@codinginflow Facebook: https://facebook.com/codinginflow Timestamps: 0:00 - Course content + prerequisites 13:40 - NodeJS + Express + TypeScript + ESLint setup (Hello World) 49:11 - MongoDB Atlas + Mongoose setup + Envalid 1:16:08 - MongoDB model setup + Express error handling (+ what is middleware) 1:40:09 - Creating notes + routers + controllers 2:03:22 - Express HTTP error handling 2:21:40 - Update + delete notes (backend) 2:37:57 - React setup with TypeScript / What is declarative UI? 2:58:03 - Fetching notes + proxy 3:13:46 - React components & CSS modules 3:30:50 - Finishing notes styling 3:50:06 - Creating notes from the frontend 4:33:50 - Update + delete notes (frontend) 5:00:24 - Loading/error/empty states 5:10:44 - User authentication with express-session & cookies 5:54:54 - Frontend authentication + extracting form field components 7:00:52 - Protecting user notes with auth middleware 7:21:33 - Routing with react-router-dom 7:37:00 - Handling different HTTP errors in React