Rust编写的JavaScript引擎,该项目是一个试验性质的项目。
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# Boa
<p align="center">
<img
alt="logo"
src="./assets/logo.svg"
width="30%"
/>
</p>
This is an experimental Javascript lexer, parser and interpreter written in Rust.
Currently, it has support for some of the language.
[![Build Status][build_badge]][build_link]
[![codecov](https://codecov.io/gh/boa-dev/boa/branch/master/graph/badge.svg)](https://codecov.io/gh/boa-dev/boa)
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[![](http://meritbadge.herokuapp.com/boa)](https://crates.io/crates/boa)
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[![](https://docs.rs/Boa/badge.svg)](https://docs.rs/Boa/)
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[build_badge]: https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fboa-dev%2Fboa%2Fbadge&style=flat
[build_link]: https://actions-badge.atrox.dev/boa-dev/boa/goto
## Live Demo (WASM)
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<https://boa-dev.github.io/boa/>
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You can get more verbose errors when running from the command line.
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## Development documentation
You can check the internal development docs at <https://boa-dev.github.io/boa/doc>.
## Conformance
To know how much of the ECMAScript specification does Boa cover, you can check out results running the ECMASCript Test262 test suite [here](https://boa-dev.github.io/boa/test262/).
## Benchmarks
See [Benchmarks](https://boa-dev.github.io/boa/dev/bench/).
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## Contributing
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Please, check the [CONTRIBUTING.md](CONTRIBUTING.md) file to know how to
contribute in the project. You will need Rust installed and an editor. We have
some configurations ready for VSCode.
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### Debugging
Check [debugging.md](./docs/debugging.md) for more info on debugging.
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### Web Assembly
This interpreter can be exposed to javascript!
You can build the example locally with:
```
$ yarn install
$ yarn serve
```
In the console you can use `window.evaluate` to pass JavaScript in.
To develop on the web assembly side you can run `yarn serve` then go to `http://localhost:8080`.
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## Roadmap
See [Milestones](https://github.com/boa-dev/boa/milestones).
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## Changelog
See [CHANGELOG.md](./CHANGELOG.md).
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## Usage
- Clone this repo.
- Run with `cargo run -- test.js` where `test.js` is an existing JS file.
- If any JS doesn't work then it's a bug. Please raise an issue!
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## Profiling
See [Profiling](./docs/profiling.md)
## Command-line Options
```
USAGE:
boa_cli [OPTIONS] [FILE]...
FLAGS:
-h, --help Prints help information
-V, --version Prints version information
OPTIONS:
-a, --dump-ast <FORMAT> Dump the abstract syntax tree (ast) to stdout with the given format [possible values: Debug, Json,
JsonPretty]
ARGS:
<FILE>... The JavaScript file(s) to be evaluated
```
## Communication
Feel free to contact us on [Discord](https://discord.gg/tUFFk9Y).
## Example
![Example](docs/img/latestDemo.gif)
## License
This project is licensed under the [Unlicense](./LICENSE-UNLICENSE) or [MIT](./LICENSE-MIT) licenses, at your option.