# rollup-typescript > Example Rollup/TypeScript set-up scaffolded from the official [Svelte template](https://github.com/sveltejs/template). This example project is used to validate the TypeScript definitions of `carbon-components-svelte`. ## Available Scripts ### `yarn dev` Starts the app in development mode. ### `yarn build` Builds the app for production. ### `yarn validate` Runs [svelte-check](https://github.com/sveltejs/language-tools#svelte-check) from the Svelte [Language Tools](https://github.com/sveltejs/language-tools) which type checks the app code.