In this tutorial, you will learn how to build a simple interactive CLI app with Node.js and TypeScript. The app will create a chat interface that reads user input and responds interactively. Let's get started! To run the app, execute the following command in your terminal: This will start the CLI app and display the welcome message. You can now…

Setting up a TypeScript project with Node.js may seem like a hassle at first, but with the right steps, you'll have everything running smoothly in no time. Whether you're building a small script or a full-fledged application, this guide will walk you through the entire process. We'll start from scratch, configure TypeScript, and set up a simple…

tRPC allows developers to create fully type safe APIs with TypeScript in full-stack applications. While the server application produces a type safe router with type safe functions (e.g. CRUD operations: create user, get user by identifier, get all users), the client application can call these functions directly on the inferred type safe router…

TypeScript is getting more popular these days for frontend and backend applications. Here you will learn how to set up TypeScript in Node.js for a backend project. The previous tutorial already demonstrated how to set up a JavaScript project with Node.js. With this as foundation, we will start migrating the project to TypeScript here. First…

Node + Express + PostgreSQL is a powerful tech stack for backend applications to offer CRUD operations. It gives you everything to expose an API (Express routes), to add business logic (Express middleware and logic within Express routes), and to use real data with a database (PostgreSQL). It's perfect for establishing a PERN (PostgreSQL, Express…

Eventually every Node.js project running with Express.js as web application will need a database. Since most server applications are stateless, in order to scale them horizontally with multiple server instances, there is no way to persist data without another third-party (e.g. database). That's why it is fine to develop an initial application with…

Handling errors in Express is often an afterthought. However, it should usually start with your Express routes, because if an error happens, your user needs to be notified about it. With the right techniques at hand, error handling in Express becomes pretty straight forward. There are several scenarios why an error might happen. It can be that a…

Node + Express + MongoDB is a powerful tech stack for backend applications to offer CRUD operations. It gives you everything to expose an API (Express routes), to add business logic (Express middleware and logic within Express routes), and to use real data with a database (MongoDB). It's perfect for establishing a MERN (MongoDB, Express, React…

Eventually every Node.js project running with Express.js as web application will need a database. Since most server applications are stateless, in order to scale them horizontally with multiple server instances, there is no way to persist data without another third-party (e.g. database). That's why it is fine to develop an initial application with…