NestJS v12 is slated for a significant transformation, marking a pivot towards ECMAScript Modules (ESM) across all official packages. This upgrade also brings native Standard Schema validation to route decorators and a revamped default toolchain.
The core of the NestJS 12 release revolves around a complete migration from CommonJS to ESM. This fundamental shift is expected to influence how developers structure and import modules within their applications. Complementing this, Standard Schema support will be integrated directly into route decorators such as @Body, @Query, and @Param, streamlining data validation processes.
The default toolchain is also getting a modernization. Vitest will replace Jest for testing, oxlint will take over from ESLint for code linting, and Rspack is set to succeed Webpack. These changes signal a move towards more contemporary development practices and potentially faster build times.
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The official announcement of NestJS 12 on X saw considerable community engagement, with over 800 likes and 93 reposts, indicating keen interest. One user expressed particular enthusiasm for the ESM support. Discussions on Reddit reveal community desires for additional CLI options, specifically the inclusion of Bun and Biome as choices for new project setups.
Building Blocks of NestJS
For newcomers, getting started with NestJS involves setting up a development environment, ensuring Node.js version 10.13.0 or newer is installed. The Nest CLI is a crucial tool for streamlining project creation, building, and maintenance. It can be installed globally via npm: npm install -g @nestjs/cli.
Creating a new NestJS application is simplified by the CLI command nest new my-nest-app. This command generates a foundational project structure with necessary dependencies. Alternatively, projects can be initialized manually by installing core files and modules using npm or yarn. For those preferring JavaScript, a JavaScript starter is available using javascript-starter.git.
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NestJS is described as a framework built with TypeScript, supporting both object-oriented, functional, and reactive programming paradigms. While TypeScript is its foundation, it allows developers to write code in pure JavaScript. The framework's design aims for efficiency and scalability in server-side application development.
NestJS's Rise
NestJS has gained significant traction as a popular framework for constructing robust and scalable server-side applications. Its architecture allows for middleware to intercept requests and execute processes without altering the request or response objects directly.
