mirror of
https://github.com/swc-project/swc.git
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1d0c78de6c
ecma_transforms: - implement es2015::instanceof - implement es2015::typeof_symbol - implement inline_globals pass ecma_parser: - `PResult<T>` is now `Result<T, ()>` and `Err(())` means that an error is emitted. - add docs
119 lines
2.2 KiB
Markdown
119 lines
2.2 KiB
Markdown
# spdy web compiler
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[](https://travis-ci.org/swc-project/swc)
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[](https://codecov.io/gh/swc-project/swc)
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-----
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Make the web (development) faster.
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swc is rust port of [babel][] and [closure compiler][].
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# Installation
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Requires nightly version of [rust][].
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```sh
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RUSTFLAGS='--cfg procmacro2_semver_exempt --cfg parallel_queries' cargo install --git https://github.com/swc-project/swc.git
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```
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# Features
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## Transforms
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New generation javascript to old-days javascript.
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- es3
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- [x] member-expression-literals
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- [x] property-literals
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- [ ] reserved-words
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- es5
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- [ ] property-mutators
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- es2015
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- [ ] arrow-functions
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- [ ] block-scoped-functions
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- [ ] block-scoping
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- [x] classes
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- [ ] computed-properties
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- [ ] destructuring
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- [ ] duplicate-keys
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- [ ] for-of
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- [ ] function-name
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- [x] instanceof
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- [ ] literals
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- [ ] new-target
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- [ ] object-super
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- [ ] parameters
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- [x] shorthand-properties
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- [x] spread
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- [x] sticky regex (`y` flag)
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- [ ] template-literals
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- [x] typeof-symbol
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- [ ] unicode-regex
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- es2016
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- [x] exponentiation-operator
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- es2017
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- [ ] async-to-generator
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- es2018
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- [ ] async-generator-functions
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- [ ] dotall-regex
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- [ ] object-rest-spread
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- [ ] optional-catch-binding
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- [ ] unicode-property-regex
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# Usage
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`test.js`:
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```js
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8 + 8;
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use(8 + 8, 8 ** 8);
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```
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## Example
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```sh
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swc jsc test.js
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```
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### Output
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```
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8 + 8;
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use(8 + 8, Math.pow(8, 8));
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```
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## Example
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```sh
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swc jsc --optimize test.js
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```
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### Output
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```
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use(8 + 8, Math.pow(8, 8));
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```
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## Contributing
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See [CONTRIBUTING.md](CONTRIBUTING.md). You may also find the architecture
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documentation useful ([ARCHITECTURE.md](ARCHITECTURE.md)).
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## License
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swc is primarily distributed under the terms of both the MIT license
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and the Apache License (Version 2.0).
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See LICENSE-APACHE and LICENSE-MIT for details.
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[babel]:https://github.com/babel/babel
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[closure compiler]:https://github.com/google/closure-compiler
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[rust]:https://www.rust-lang.org
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