Rsbuild vs Rslib

Rsbuild is a web-based build tool for web applications, powered by Rspack. It can create projects with no required configuration or through a configurable build API. Rspack handles bundling by default, while SWC transforms and minifies JavaScript and TypeScript. Framework plugins cover React, Vue, Svelte, Solid, and Preact. Development mode enables hot module replacement by default, and production builds enable JavaScript and CSS minification. Optional styling integrations include Tailwind CSS, UnoCSS, Sass, Less, and Stylus. Rsbuild works with most webpack plugins and all Rspack plugins, and provides first-class Module Federation support for micro-frontend applications. It also lists code splitting, tree shaking, source maps, TypeScript support, and a plugin API. The software is free and open source under the MIT license, runs on the web, and provides a StackBlitz example and Discord community. Rsbuild v2 requires Node.js 20.19+ or 22.12+; v1 requires Node.js 18.12.0 or higher.

Rslib is a free, open-source tool for developing JavaScript packages and UI component libraries. Based on Rsbuild and powered by Rspack, it integrates Rust-based tools including SWC and Lightning CSS. It supports bundle and bundleless build modes and outputs ESM, CJS, UMD, Module Federation, and IIFE formats. Framework integrations support component libraries for React, Vue, Svelte, and Solid. Rslib can generate TypeScript declaration files, including isolated declarations, though declaration generation is not enabled by default. Plugin support includes Rsbuild, Rspack, and webpack plugins. Its development integrations include Rstest for testing, Storybook for component development, Rspress for documentation and component previews, and Rsdoctor for build analysis. The quick-start guide lists Node.js, Deno, and Bun as runtime options, while Rslib v1 requires Node.js 20.19+ or 22.12+. It is available for API, Linux, macOS, web, and Windows, and is released under the MIT license.