Posted on Aug 2 • Originally published at bezkoder.com Express is one of the most popular web frameworks for Node.js that supports routing, middleware, view system... In this tutorial, I will show you how to build Node.js Rest Api example using Express and Typescript.Related Posts:We will build Node.js Rest Api using Typescript that handles GET/POST/PUT/DELETE Http requests.First, we start with an Express web server. Next, we write the controller. Then we define routes for handling all CRUD operations:The following table shows overview of the Rest APIs that will be exported:Finally, we're gonna test the Express Typescript Rest Api using Postman.Our project structure will be like this:Open terminal/console, then create a folder for our application:Initialize the Node.js application with a package.json file:We need to install necessary modules: express, typescript, cors, ts-node, @types/node, @types/express and @types/cors.Run the command:The package.json file should look like this:Next, we generate a tsconfig.json file with command:Open tsconfig.json and modify the content like this:To work with TypeScript, we need TypeScript compiler (tsc), which converts TypeScript code into JavaScript (inside ./build folder). TypeScript files have the .ts extension. Once compiled to JavaScript, we can run the resulting JavaScript files using a JavaScript runtime environment or include them in web applications.So we modify "scripts" property of package.json file by adding build, dev and start like this:In src folder, create index.ts file that export Server class.What we do are:We continue to create server.ts outside the src folder.In the code, we:Let's run the app with command: npm run start.To handle HTTP requests, we create a new Router object using express.Router() function.In src/routes folder, create home.routes.ts file that exports Router object.router.get("/", welcome) is for handling Http GET requests with welcome as handler function.In src/controllers/home.controller.ts, we export welcome function.Next we create Routes class in src/routes/index.ts.Then we import Routes into Server class's constructor() method and initialize a new Routes object.Let's stop and re-start the server. Open your browser with url http://localhost:8080/api, you will see:Now we implement more routes to Routes class that follows APIs:In src/routes/index.ts, add middleware function for "/api/tutorials" endpoint.We continue to define the above TutorialRoutes class which initializes a TutorialController object that provides CRUD operation methods. It exports Router object. src/routes/tutorial.routes.tsIn src/controllers/tutorial.controller.ts, we define and export TutorialController class that has create, findAll, findOne, update, delete methods.Run the Node.js Express Typescript Rest APIs with command:npm run startToday, we've learned how to create Node.js Rest Apis with an Express Typescript web server. We also know way to write a controller and define routes for handling all CRUD operations.Happy learning! See you again.File Upload Rest API:You can find the complete source code for this example on Github.With Database:Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well Confirm For further actions, you may consider blocking this person and/or reporting abuse Dhruv Joshi - Jul 24 Stephen Cooper - Jul 24 Syed Muhammad Ali Raza - Jul 24 ABIDULLAH786 - Jul 20 Once suspended, tienbku will not be able to comment or publish posts until their suspension is removed. Once unsuspended, tienbku will be able to comment and publish posts again. Once unpublished, all posts by tienbku will become hidden and only accessible to themselves. If tienbku is not suspended, they can still re-publish their posts from their dashboard. Note: Once unpublished, this post will become invisible to the public and only accessible to Tien Nguyen. They can still re-publish the post if they are not suspended. Thanks for keeping DEV Community safe. Here is what you can do to flag tienbku: tienbku consistently posts content that violates DEV Community's code of conduct because it is harassing, offensive or spammy. Unflagging tienbku will restore default visibility to their posts. DEV Community — A constructive and inclusive social network for software developers. With you every step of your journey. Built on Forem — the open source software that powers DEV and other inclusive communities.Made with love and Ruby on Rails. DEV Community © 2016 - 2023. We're a place where coders share, stay up-to-date and grow their careers.