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https://github.com/swc-project/swc.git
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b02e189d07
swc_ecma_codegen: - Fix codegen of `U+0028` and `U+0029`. swc_ecma_minifier: - Implement MVP. swc_ecma_transforms_base: - `fixer`: Handle seq/await in rhs of for-of.
42 lines
1.2 KiB
Markdown
42 lines
1.2 KiB
Markdown
# Minifier
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EcmaScript minifier for the swc project. This is basically a port of terser.
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# Note
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Currently name mangler is very simple. To focus on creating a MVP, I (kdy1) will use simple logic for name mangler and implement the content-aware name mangler after publishing first non-beta version.
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## Testing
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### Real-library tests
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You can use vscode to see diffs. Select a file from `tests/projects/output` and select the corresponding file from `tests/projects/refs`. Then you can right click to see an option to open diff.
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#### Splitting a library test
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Extracting only subset from a library test makes development much easier.
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Split status:
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- [ ] angular-1.2.5
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- [x] backbone-1.1.0
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- [ ] jquery-1.9.1
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- [ ] jquery.mobile-1.4.2
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- [ ] mootools-1.4.5
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- [x] underscore-1.5.2
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- [ ] yui-3.12.0
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### Tests from terser
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Tests ported from terser has
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- input.js
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- config.json
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- mangle.json (if name mangling is enabled)
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- output.js (if exists and can be modified if our one is better or due to lack of frequency-aware base54)
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- output.terser.js (if exists)
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#### Copying tests
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Replace the content of `terser/test/compress.js` with it of `scripts/compress.js` and run `npm run test:compress`
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