TypeScript in Express – TypeScript Tutorial

Learn to build a fully typed Express server with TypeScript, covering routes, middleware, data handling, and more. ✏️ Study this course interactively on Scrimba: https://scrimba.com/learn-typescript-... Code is available on the Scrimba course page for each lesson. TypeScript makes Express servers safer, more scalable, and easier to maintain. In this hands-on module, you'll go from setting up a TypeScript-powered Express environment to structuring routes, controllers, and middleware with full type safety. By the end of the video, you'll have the skills to build production-ready Express APIs with confidence. ❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp ⭐️ Contents ⭐️ 0:00:00 Intro to Express & TypeScript 0:02:08 Setting up a Express and TypeScript Environment 0:05:14 Set up your environment 0:07:12 Setting up an Express & TypeScript project 0:10:15 Running an Express & TypeScript project 0:13:17 Typing Express data 0:15:34 Restarting the Express server 0:19:22 Typing the real data 0:23:40 Request and Response types 0:26:29 cors and TypeScript 0:29:13 Typing the 404 catch-all 0:31:19 Automating the server restart 0:32:56 A more specific Response 0:35:25 A more specific Request 0:39:03 Non-existent IDs 0:41:31 String query params 0:44:43 An even more specific Request 0:47:27 Boolean query params 0:51:00 Number query params 0:54:05 Separating concerns with Router 0:59:15 Separating concerns with controllers 1:03:13 Adding and typing middleware 1:08:53 Your own middleware 1:13:30 Congratulations! 🎉 Thanks to our Champion and Sponsor supporters: 👾 @omerhattapoglu1158 👾 @goddardtan 👾 @akihayashi6629 👾 @kikilogsin 👾 @anthonycampbell2148 👾 @tobymiller7790 👾 @rajibdassharma497 👾 @CloudVirtualizationEnthusiast 👾 @adilsoncarlosvianacarlos 👾 @martinmacchia1564 👾 @ulisesmoralez4160 👾 @_Oscar_ 👾 @jedi-or-sith2728 👾 @justinhual1290 -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news