nodejs-best-practices

Node.js Best Practices - Node.js Development Decision Principles and Practice Guide

Skill Overview

Node.js Best Practices is an intelligent skill focused on decision principles for Node.js development. It helps developers choose the right framework, architectural patterns, and programming practices for specific scenarios, emphasizing developing decision-making thinking rather than mechanically applying code templates.

Applicable Scenarios

1. New Project Technology Selection

When you start a new Node.js project, this skill helps you choose the most suitable framework among Hono, Fastify, Express, NestJS, and others based on deployment targets (edge computing/Serverless, traditional servers), performance requirements, and your team’s technology stack.

2. Project Architecture Design and Refactoring

For projects that need to design a layered architecture, plan error-handling strategies, and establish validation standards, this skill provides clear architectural principles and design patterns to help you build testable, maintainable, and scalable code structures.

3. Code Quality and Security Review

When you need to review the security of existing code, the correctness of asynchronous patterns, and the compliance of error-handling conventions, this skill can point out common anti-patterns and provide improvement suggestions based on the latest standards as of 2025.

Core Features

Framework Selection Decision Tree

Provides a framework selection guide based on project characteristics, with clear recommendations such as Hono for edge computing scenarios, Fastify for high-performance APIs, NestJS for enterprise-level projects, Express for maintaining legacy systems, and an accompanying checklist of selection questions to help you make decisions.

Architecture and Asynchronous Pattern Guidance

Covers layered architecture design principles (Controller-Service-Repository), asynchronous pattern selection (async/await, Promise.all, Promise.allSettled, etc.), strategies to avoid blocking the event loop, and solutions for handling CPU-intensive tasks. It helps developers write high-performance, non-blocking code.

Security and Validation Best Practices

Provides a comprehensive security checklist (input validation, parameterized queries, password hashing, JWT verification, rate limiting, security header configuration, etc.) and a validation library selection guide (Zod, Valibot, ArkType, Yup use cases) to help you build secure and reliable Node.js applications.

Common Questions

Which framework should a Node.js project use?

There is no universal “best” framework. Choose based on your deployment goal: use Hono for edge/Serverless (fastest cold starts); use Fastify for performance (2–3x faster than Express); use NestJS for enterprise projects (structured, dependency injection); use Express for maintaining legacy code (most mature ecosystem). Make an overall decision by considering team experience, project scale, and performance requirements.

What is the difference between Node.js ESM and CommonJS?

ESM (import/export) is the modern standard. It supports better tree-shaking and asynchronous module loading, and is recommended for new projects. CommonJS (require) is a legacy format with better npm package compatibility and is suitable for maintaining existing codebases. Node.js 22+ supports running TypeScript files directly, simplifying the development workflow.

What are the best practices for error handling in Node.js?

Use centralized error handling: create custom error classes, throw errors from any layer, and catch them uniformly in a top-level middleware. Return appropriate HTTP status codes and user-friendly messages to the client, and log complete stack traces along with request context. Use precise status codes such as 400/401/403/404/409/422/500 based on the error type.