Learn Nestjs - 10 Code Examples & CST Typing Practice Test
NestJS is a progressive Node.js framework for building efficient, scalable, and maintainable server-side applications using TypeScript and modern JavaScript.
Learn NESTJS with Real Code Examples
Updated Nov 25, 2025
Installation Setup
Install Node.js and npm
Install Nest CLI: `npm i -g @nestjs/cli`
Create project: `nest new project-name`
Install dependencies and start development server
Run `npm run start:dev` for hot reload
Environment Setup
Install Node.js and npm
Install Nest CLI
Create project and install dependencies
Set up TypeScript compiler
Run development server and hot reload
Config Files
nest-cli.json - CLI config
tsconfig.json - TypeScript config
package.json - dependencies and scripts
src/main.ts - bootstrap file
src/app.module.ts - root module
Cli Commands
nest new project-name
nest generate module users
nest generate controller users
nest generate service users
nest build/start
Internationalization
Use i18n packages for localization of messages
Translate error messages and logs
Format dates/numbers based on locale
Support multi-language APIs
Externalize all user-facing strings
Accessibility
Ensure APIs are consistent and well-documented
Handle errors gracefully with HTTP status codes
Provide clear and structured responses
Enable CORS and authentication where required
Follow API design best practices
Ui Styling
Not applicable; backend framework
Serve static assets if needed
Integrate with templating engines if required
API responses structured in JSON
Optionally render server-side templates (e.g., Handlebars, Pug)
State Management
Stateless HTTP request handling
Service-level shared state via DI
Use database or cache for persistent state
Message queues for event-driven state
Avoid in-memory mutable global state
Data Management
Integrate with relational/non-relational DB
Use ORMs like TypeORM or Prisma
Validate and transform input via Pipes
Serialize/deserialize JSON for APIs
Caching via Redis or in-memory services
Frequently Asked Questions about Nestjs
What is Nestjs?
NestJS is a progressive Node.js framework for building efficient, scalable, and maintainable server-side applications using TypeScript and modern JavaScript.
What are the primary use cases for Nestjs?
Building RESTful APIs and GraphQL services. Creating microservices with built-in support. Developing server-side applications with TypeScript. Implementing real-time WebSocket applications. Building enterprise-grade backend systems
What are the strengths of Nestjs?
Strong typing with TypeScript ensures code reliability. Highly modular and scalable architecture. Integration with modern backend tools and frameworks. Supports enterprise-level patterns and practices. Comprehensive documentation and strong community support
What are the limitations of Nestjs?
Steeper learning curve for developers unfamiliar with TypeScript or Angular-style patterns. Adds abstraction over raw Node.js/Express APIs. Some advanced features require understanding of decorators and DI. Initial setup may feel heavy for small projects. Less flexible than lightweight frameworks like Fastify/Express for simple apps
How can I practice Nestjs typing speed?
CodeSpeedTest offers 10+ real Nestjs code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.