Rslib vs Sucrase
Rslib
lib.rsbuild.devSucrase
sucrase.ioSide by side
| Figure | Rslib | Sucrase |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| API | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · JavaScript Build Tools | 8.6 (#2) | 7.3 (#21) |
| License | Rslib is free and open source software released under the MIT license. | Sucrase is MIT-licensed. |
| Purpose | Rslib is an Rsbuild-based tool for developing JavaScript libraries and UI component libraries. | Sucrase is a fast alternative to Babel for development builds targeting modern JavaScript runtimes. |
Plans
In their own words
Rslib
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.