API Versioning in NestJS (A Guide for All Levels)

API Versioning in NestJS

Introduction

In the ever-evolving world of software development, maintaining and upgrading APIs (Application Programming Interfaces) is a critical task. NestJS, a progressive Node.js framework, offers efficient ways to manage API versions. This article explains why API versioning is essential and how to implement it in NestJS, including code examples suitable for beginners.

Why API Versioning?

1. Backward Compatibility: API versioning allows you to introduce new features or changes without breaking existing clients.
2. Smooth Transition: It provides a way for clients to transition to new API versions at their own pace.
3. Clarity and Organization: Different versions make it easier to track changes and understand the evolution of your API.

API Versioning Strategies

• URI Versioning: Including the version number in the URI (e.g., /v1/users).
• Header Versioning: Using HTTP headers to specify the API version.
• Parameter Versioning: Using a request parameter to define the version.

Implementing API Versioning in NestJS