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Cybernetically enhanced web apps

Cybernetically enhanced web apps: Svelte npm version install size build status license

What is Svelte?

Svelte is a new way to build web applications. It’s a compiler that takes your declarative components and converts them into efficient JavaScript that surgically updates the DOM.

Learn more at the Svelte website, or stop by the Discord chatroom.


Pull requests are encouraged and always welcome. Pick an issue and help us out!

To install and work on Svelte locally:

bashgit clone sveltenpm install

Many tests depend on newlines being preserved as . On Windows, you can ensure this by cloning with: bashgit -c core.autocrlf=false clone

To build the compiler, and all the other modules included in the package:

bashnpm run build

To watch for changes and continually rebuild the package (this is useful if you’re using npm link to test out changes in a project locally):

bashnpm run dev

The compiler is written in TypeScript, but don’t let that put you off — it’s basically just JavaScript with type annotations. You’ll pick it up in no time. If you’re using an editor other than Visual Studio Code you may need to install a plugin in order to get syntax highlighting and code hints etc.

Running Tests

bashnpm run test

To filter tests, use -g (aka --grep). For example, to only run tests involving transitions:

bashnpm run test -- -g transition

The source code for, including all the documentation, lives in the site directory. The site is built with Sapper. To develop locally:

bashcd sitenpm install && npm run updatenpm run dev



To restore the repository download the bundle


and run:

 git clone sveltejs-svelte_-_2019-11-25_05-58-38.bundle 

Uploader: sveltejs
Upload date: 2019-11-25