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# Get started
Install the dependencies...
```
npm install
```
...then start [Rollup](https://rollupjs.org):
```
npm run dev
```
Navigate to [localhost:8080](http://localhost:8080). You should see your app running. Edit a component file in `src`, save it, and reload the page to see your changes.
By default, the server will only respond to requests from localhost. To allow connections from other computers, edit the `sirv` commands in package.json to include the option `--host 0.0.0.0`.
If you're using [Visual Studio Code](https://code.visualstudio.com/) we recommend installing the official extension [Svelte for VS Code](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode). If you are using other editors you may need to install a plugin in order to get syntax highlighting and intellisense.
## Building and running in production mode
To create an optimised version of the app:
```
npm run build
```
You can run the newly built app with `npm run start`. This uses [sirv](https://github.com/lukeed/sirv), which is included in your package.json's `dependencies` so that the app will work when you deploy to platforms like [Heroku](https://heroku.com).