snowpack dev - Snowpack’s dev server is an instant dev environment for unbundled development. The dev server will build a file only when it’s requested by the browser. That means that Snowpack can start up instantly (usually in <50ms) and scale to infinitely large projects without slowing down. In contrast, it’s common to see 30+ second dev startup times when building large apps with a traditional bundler.

Snowpack supports JSX & TypeScript source code by default. You can extend your build even further with custom plugins that connect Snowpack with your favorite build tools: TypeScript, Babel, Vue, Svelte, PostCSS, Sass… go wild!