Command Line Interface

SvelteKit includes a command line interface for building and running your app.

In the default project template svelte-kit dev, svelte-kit build and svelte-kit preview are aliased as npm run dev, npm run build and npm run preview respectively. You can also invoke the CLI with npx:

npx svelte-kit dev

svelte-kit devpermalink

Starts a development server. It accepts the following options:

• -p/--port — which port to start the server on
• -o/--open — open a browser tab once the server starts
• -h/--host — expose the server to the network.
• -H/--https — launch an HTTPS server using a self-signed certificate. Useful for testing HTTPS-only features on an external device

svelte-kit buildpermalink

Builds a production version of your app, and runs your adapter if you have one specified in your config. It accepts the following option:

• --verbose — log more detail

After building the app, you can reference the documentation of your chosen adapter and hosting platform for specific instructions on how to serve your app.

svelte-kit previewpermalink

After you've built your app with svelte-kit build, you can start the production version (irrespective of any adapter that has been applied) locally with svelte-kit preview. This is intended for testing the production build locally, not for serving your app, for which you should always use an adapter.

Like svelte-kit dev, it accepts the following options:

• -p/--port
• -o/--open
• -h/--host
• -H/--https

svelte-kit packagepermalink

svelte-kit package is currently experimental and is not subject to Semantic Versioning rules. Non-backward compatible changes may occur in any future release.

For package authors, see packaging.