swc/ecmascript/minifier/README.md

# Minifier

EcmaScript minifier for the swc project. This is basically a port of terser.

# Note

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.

## Testing

Tests ported from terser has

-   input.js
-   config.json
-   mangle.json (if name mangling is enabled)
-   output.js (if exists and can be modified if our one is better or due to lack of frequency-aware base54)
-   output.terser.js (if exists)

## Copying tests

Replace the content of `terser/test/compress.js` with it of `scripts/compress.js` and run `npm run test:compress`
feat(es/minifier): Implement minifier partially (#1302) Co-authored-by: Fábio Santos <fabiosantosart@gmail.com> 2021-05-20 07:51:30 +03:00			`# Minifier`

			`EcmaScript minifier for the swc project. This is basically a port of terser.`

feat(es/minifier): Implement more rules (#1735) swc_ecma_minifier: - Implement `evaluate` partially. - Store 'expected output' from terser along with our result. swc_ecma_transforms_base: - `fixer`: Don't wrap `+ (a % b)`. swc_ecma_transforms_optimization: - `expr_simplifier`: Preserve this in calls. 2021-05-25 10:39:07 +03:00			`# Note`

			`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.`

			`## Testing`

			`Tests ported from terser has`

			`- input.js`
			`- config.json`
			`- mangle.json (if name mangling is enabled)`
			`- output.js (if exists and can be modified if our one is better or due to lack of frequency-aware base54)`
			`- output.terser.js (if exists)`

feat(es/minifier): Implement minifier partially (#1302) Co-authored-by: Fábio Santos <fabiosantosart@gmail.com> 2021-05-20 07:51:30 +03:00			`## Copying tests`

			Replace the content of `terser/test/compress.js` with it of `scripts/compress.js` and run `npm run test:compress`