NestJS is a progressive Node.js framework for building efficient and scalable server-side applications. It uses TypeScript by default, supports both Express and Fastify, and provides an out-of-the-box application architecture inspired by Angular. NestJS combines elements of OOP, FP, and FRP, making it ideal for building enterprise-grade applications.
The skill is based on NestJS documentation, generated at 2026-02-01.
CLI
| Topic | Description | Reference |
|---|---|---|
| CLI Overview | Scaffolding, building, and running applications | cli-overview |
| Monorepo & Libraries | Workspaces, apps, shared libraries | cli-monorepo |
Core References
| Topic | Description | Reference |
|---|---|---|
| Controllers | Route handlers, HTTP methods, request/response handling | core-controllers |
| Modules | Application structure, feature modules, shared modules, dynamic modules | core-modules |
| Providers | Services, dependency injection, custom providers | core-providers |
| Dependency Injection | DI fundamentals, custom providers, scopes | core-dependency-injection |
| Middleware | Request/response middleware, functional middleware | core-middleware |
Fundamentals
| Topic | Description | Reference |
|---|---|---|
| Pipes | Data transformation and validation pipes | fundamentals-pipes |
| Guards | Authorization guards, role-based access control | fundamentals-guards |
| Interceptors | Aspect-oriented programming, response transformation | fundamentals-interceptors |
| Exception Filters | Error handling, custom exception filters | fundamentals-exception-filters |
| Custom Decorators | Creating custom parameter decorators | fundamentals-custom-decorators |
| Dynamic Modules | Configurable modules, module configuration | fundamentals-dynamic-modules |
| Execution Context | Accessing request context, metadata reflection | fundamentals-execution-context |
| Provider Scopes | Singleton, request-scoped, transient providers | fundamentals-provider-scopes |
| Lifecycle Events | Application and provider lifecycle hooks | fundamentals-lifecycle-events |
| Lazy Loading | Loading modules on-demand for serverless | fundamentals-lazy-loading |
| Circular Dependency | Resolving circular dependencies with forwardRef | fundamentals-circular-dependency |
| Module Reference | Accessing providers dynamically with ModuleRef | fundamentals-module-reference |
| Testing | Unit testing and e2e testing with @nestjs/testing | fundamentals-testing |
Techniques
| Topic | Description | Reference |
|---|---|---|
| Validation | ValidationPipe, class-validator, DTO validation | techniques-validation |
| Configuration | Environment variables, ConfigModule, configuration management | techniques-configuration |
| Database | TypeORM, Prisma, MongoDB integration | techniques-database |
| Caching | Cache manager, Redis integration, auto-caching | techniques-caching |
| Logging | Built-in logger, custom loggers, JSON logging | techniques-logging |
| File Upload | File upload handling with multer, validation | techniques-file-upload |
| Versioning | URI, header, and media type API versioning | techniques-versioning |
| Serialization | Response serialization with class-transformer | techniques-serialization |
| Queues | Background job processing with BullMQ | techniques-queues |
| Task Scheduling | Cron jobs, intervals, and timeouts | techniques-task-scheduling |
| Events | Event-driven architecture with EventEmitter | techniques-events |
| HTTP Module | Making HTTP requests with Axios | techniques-http-module |
| Fastify | Using Fastify for better performance | techniques-fastify |
| Sessions & Cookies | HTTP sessions and cookies for stateful apps | techniques-sessions-cookies |
| Streaming & SSE | Compression, file streaming, Server-Sent Events | techniques-compression-streaming-sse |
| MVC & Serve Static | Template rendering (Handlebars) and SPA static serving | techniques-mvc-serve-static |
Security
| Topic | Description | Reference |
|---|---|---|
| Authentication | Passport integration, JWT authentication | recipes-authentication |
| Authorization | RBAC, claims-based, CASL integration | security-authorization |
| CORS & Rate Limiting | CORS, Helmet, ThrottlerModule | security-cors-helmet-rate-limiting |
| Encryption & Hashing | bcrypt, argon2, password hashing | security-encryption-hashing |
OpenAPI
| Topic | Description | Reference |
|---|---|---|
| Swagger | OpenAPI documentation generation | openapi-swagger |
WebSockets
| Topic | Description | Reference |
|---|---|---|
| Gateways | Real-time communication with Socket.IO/ws | websockets-gateways |
| Guards & Exception Filters | WsException, BaseWsExceptionFilter, interceptors, pipes | websockets-advanced |
Microservices
| Topic | Description | Reference |
|---|---|---|
| Overview | Transport layers, message patterns, events | microservices-overview |
| gRPC | Protocol Buffers, streaming, metadata, reflection | microservices-grpc |
| Transports | Redis, Kafka, NATS, RabbitMQ configuration | microservices-transports |
GraphQL
| Topic | Description | Reference |
|---|---|---|
| Overview | Code-first and schema-first approaches | graphql-overview |
| Resolvers & Mutations | Queries, mutations, field resolvers | graphql-resolvers-mutations |
| Subscriptions | Real-time subscriptions with PubSub | graphql-subscriptions |
| Scalars, Unions & Enums | Interfaces, scalars, union types, enums | graphql-scalars-unions-enums |
Recipes
| Topic | Description | Reference |
|---|---|---|
| CRUD Generator | Nest CLI resource generator | recipes-crud-generator |
| Documentation | OpenAPI/Swagger integration | recipes-documentation |
| TypeORM | TypeORM integration and usage | recipes-typeorm |
| Prisma | Prisma ORM integration | recipes-prisma |
| Mongoose | MongoDB with Mongoose ODM | recipes-mongoose |
| CQRS | Command Query Responsibility Segregation | recipes-cqrs |
| Terminus | Health checks and readiness/liveness probes | recipes-terminus |
FAQ
| Topic | Description | Reference |
|---|---|---|
| Raw Body & Hybrid | Webhook signature verification, HTTP + microservices | faq-raw-body-hybrid |
Best Practices
| Topic | Description | Reference |
|---|---|---|
| Request Lifecycle | Understanding execution order and flow | best-practices-request-lifecycle |