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svelte/README.md

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<p align="center">
<a href="https://svelte.dev">
6 years ago
<img alt="Cybernetically enhanced web apps: Svelte" src="banner.png">
</a>
</p>
8 years ago
## 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](https://svelte.dev), or stop by the [Discord chatroom](https://discord.gg/yy75DKs).
## Development
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Pull requests are encouraged and always welcome. [Pick an issue](https://github.com/sveltejs/svelte/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc) and help us out!
To install and work on Svelte locally:
```bash
git clone git@github.com:sveltejs/svelte.git
cd svelte
npm install
```
To build the compiler, and all the other modules included in the package:
```bash
npm run build
```
To watch for changes and continually rebuild the package (this is useful if you're using [npm link](https://docs.npmjs.com/cli/link.html) to test out changes in a project locally):
```bash
npm run dev
```
The compiler is written in [TypeScript](https://www.typescriptlang.org/), 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 [VSCode](https://code.visualstudio.com/) you may need to install a plugin in order to get syntax highlighting and code hints etc.
### Running Tests
```bash
npm run test
```
To filter tests, use `-g` (aka `--grep`). For example, to only run tests involving transitions:
```bash
npm run test -- -g transition
```
## svelte.dev
The source code for https://svelte.dev, including all the documentation, lives in the [site](site) directory. The site is built with [Sapper](https://sapper.svelte.technology) To develop locally:
```bash
cd site
npm install
npm run dev
```
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## License
[MIT](LICENSE)