Rslib vs Vite

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.

Vite is a free build tool for modern web projects. Its development server serves source files on demand using native ES modules and supports Hot Module Replacement. For production, the `vite build` command bundles application assets for static hosting. Vite supports TypeScript, JSX, CSS, web workers, and WebAssembly; plugins can extend the tool, including its development server and SSR functionality. Its plugin interface builds on Rollup's. Documented framework integrations include Vue, React, Preact, Svelte, Solid, Qwik, Nuxt, SvelteKit, Astro, and React Router. Developers can try Vite in a browser through StackBlitz using supported framework templates. It runs on Linux, macOS, Windows, and the web, and is MIT licensed and free and open source. Vite requires Node.js 20.19+ or 22.12+, though some templates may need a higher version. It transpiles TypeScript but does not type-check it; type checking needs to be handled separately. Legacy browser support can be added with the official `@vitejs/plugin-legacy`.