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Articles tagged with #nodejs
1) Install Postman Go to postman.com/downloads. Download the installer for your OS (Windows/macOS/Linux). Install and open Postman. If you’re prompted to sign in, you can choose “Use the lightweight API client” to skip account setup. Tip: Keep ...
What is a REST API (in plain words)? A REST API is an HTTP-based interface that follows the Representational State Transfer principles. If your API follows these principles, we call it “RESTful.” At a high level: a client (browser, mobile app, anothe...
In the previous lesson we saw how main.ts bootstraps the app. It creates the Nest application from a single root module: AppModule. In this post we’ll: clarify what AppModule does (and why it matters), demystify file naming vs. decorators, show ho...
1) Big Picture: How Nest boots (main.ts) → (AppModule) → (Your Feature Modules) main.ts bootstraps the application. It creates a Nest instance from AppModule. AppModule is the root module that imports your feature modules (Users, Posts, Auth,...
1) What is a Module? A module is a cohesive package of functionality. In NestJS, every feature lives inside a module. Think: UsersModule for user-related concerns, PostsModule for blog posts, etc. Each module has a single entry file: *.module.ts (e...
1) Install Node.js (LTS) Go to nodejs.org and download the LTS installer for your OS. Run the installer with the defaults. Verify in a terminal: node --version npm --version ✅ Anything reasonably recent is fine. If you’re new to Node, stick to...