Rslib

Rslib is a developer-centric build tool engineered specifically for creating modern JavaScript and TypeScript libraries. Built on top of the ultra-fast Rspack bundler, it eliminates the complexity of configuring build pipelines while delivering exceptional compilation speeds that dramatically improve development workflows.

The tool addresses a critical pain point in library development: the tedious setup of build configurations, TypeScript compilation, module formats, and bundling optimizations. Rslib provides sensible defaults that work out-of-the-box while remaining flexible enough to customize when needed, letting you focus on writing code rather than wrestling with tooling.

As part of the Rstack ecosystem, Rslib integrates seamlessly with Rsbuild and leverages Rspack's Rust-powered performance advantages. It automatically handles dual package exports (ESM/CommonJS), TypeScript declaration generation, tree-shaking optimization, and minification. Whether you're building utility libraries, UI component packages, or framework-agnostic tools, Rslib streamlines the entire process.

The intuitive API and comprehensive documentation make it accessible for developers transitioning from Webpack or other bundlers, while the performance gains from Rspack ensure your build times remain minimal even as your library grows in complexity.