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lean4web

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Lean web editor

// repository documentation

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# Lean Web

This is a web application running Lean 4 server-side. There is a playground hosted at [live.lean-lang.org](https://live.lean-lang.org) and one at [lean.math.hhu.de](https://lean.math.hhu.de).

In contrast to the [Lean 3 web editor](https://github.com/leanprover-community/lean-web-editor), in this web editor, the Lean server is
running on a web server, and not in the browser.

## Scope of Lean Web

- Minimalistic and accessible way to run some (smallish) Lean snippets
- Run [MWEs](https://leanprover-community.github.io/mwe.html) from [Zulip](https://leanprover.zulipchat.com) with the latest [Mathlib](https://github.com/leanprover-community/mathlib4) installed.
- Demonstrate some Lean code in talks/lecutres.
- Doodling around with Lean before installing it as a newcomer.
- Run some Lean code in a mobile context.

Currently, serious Lean code development and larger projects are considered out-of-scope. For these, it might be more suitable to look at a setup using Codespaces or Gitpot.

While `lean4web` looks very similar to VSCode with the [Lean4 extension](https://marketplace.visualstudio.com/items?itemName=leanprover.lean4) installed - and it reuses much of that code - `lean4web` does not claim to be feature complete.

## Contribution

If you experience any problems, or have feature requests, please open an issue here!

PRs fixing issues are very welcome!

Regarding new features, it's best to write an issue first to discuss them: For example, some functionality might be better implemented in [lean4monaco](https://github.com/hhu-adam/lean4monaco) which provides the key features and a discussion might be helpful to figure this out.

## Documentation

- [User Manual](./doc/Usage.md): Specification of `lean4web` features for the end user.
- [Installation](./doc/Installation.md): Instructions to install your own instance of `lean4web` on your own server
- [Adding Projects](./doc/Projects.md): For server maintainers
- [Development](./doc/Development.md): Instructions to contribute to `lean4web` itself
- [Server Maintenance](./doc/Maintenance.md): For server maintainers
- [Troubleshoot](./doc/Troubleshoot.md)

lean4web

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