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oxc/crates/oxc_minifier
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oxc-bot 1428527da6
release(crates): v0.41.0 (#7846) 
## [0.41.0] - 2024-12-13

- fb325dc ast: [**BREAKING**] `span` field must be the first element
(#7821) (Boshen)

- 96a26d3 ast: [**BREAKING**] Rename `is_strict` methods to
`has_use_strict_directive` (#7783) (overlookmotel)

### Features

- 8991f33 ast: Add `visit_span` to `Visit` and `VisitMut` (#7816)
(overlookmotel)
- f7900ab ast: Add `ArrowFunctionExpression::has_use_strict_directive`
method (#7784) (overlookmotel)
- e727ae9 transformer/class-properties: Transform super member
expressions that are inside static prop initializer (#7815) (Dunqing)

### Bug Fixes

- 7610dc1 parser: Parse `import source from 'mod'` (#7833) (Boshen)
- 9479e2b semantic: Missing references when `export {}` references a
type-only binding and a normal (#7812) (Yunfei He)
- 7a83230 semantic: Missing reference when `export default` references a
type alias binding (#7813) (Dunqing)
- 4a3bca8 semantic: Fix identifying strict mode arrow functions (#7785)
(overlookmotel)
- 5b7e1ad transformer: Remove span of define value (#7811) (Hiroshi
Ogawa)
- 14896cb transformer/class-properties: Create temp vars in correct
scope (#7824) (overlookmotel)
- 25bb6da transformer/class-properties: Fix `ScopeId`s in instance prop
initializers (#7823) (overlookmotel)
- 65b109a transformer/class-properties: No `raw` for generated
`StringLiteral` (#7825) (overlookmotel)
- 2964a61 transformer/class-properties: Unwrap failed when private field
expression doesn't contain optional expression in `ChainExpression`
(#7798) (Dunqing)
- 6fa6785 transformer/class-properties: Panic when the callee or member
is `ParenthesisExpression` or TS-syntax expressions. (#7795) (Dunqing)
- bb22c67 transformer/class-properties: Fix `ScopeId`s in static prop
initializers (#7791) (overlookmotel)
- caa57f1 transformer/class-properties: Fix scope flags in static prop
initializers (#7786) (overlookmotel)

### Performance

- 4448b63 codegen: Faster writing indentation (#7820) (overlookmotel)
- afaaffa codegen: Fast path for `options.print_comments()` (#7806)
(Boshen)

### Refactor

- 0f367e5 semantic: Improve the logic of resolving references to be
cleaner (#7829) (Dunqing)
- 5710950 semantic: Move export-related reference flags logic to visit
functions (#7828) (Dunqing)
- b290ebd transformer: Handle `<CWD>` in test runner (#7799) (Dunqing)
- e70deb9 transformer/class-properties: Locate instance props insertion
location in separate step (#7819) (overlookmotel)
- afc5f1e transformer/class-properties: De-deduplicate code (#7805)
(overlookmotel)
- 47a91d2 transformer/class-properties: Shorten code (#7804)
(overlookmotel)
- 54ef2b9 transformer/class-properties: Rename
`debug_assert_expr_is_not_parenthesis_or_typescript_syntax` (#7803)
(overlookmotel)
- 3cdc47c transformer/class-properties: `#[inline(always)]` on
`assert_expr_neither_parenthesis_nor_typescript_syntax` (#7802)
(overlookmotel)

### Testing

- d72c888 transformer/replace-global-defines: Remove panicking test
(#7838) (overlookmotel)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
2024-12-13 21:25:13 +08:00
..
examples refactor(minifier): remove unused ast pass from DCE (#7540) 2024-11-29 08:10:07 +00:00
src refactor(ast)!: change 'raw' from &str to Option<Atom> (#7547) 2024-12-05 00:34:45 +00:00
tests refactor(ast)!: change 'raw' from &str to Option<Atom> (#7547) 2024-12-05 00:34:45 +00:00
Cargo.toml release(crates): v0.41.0 (#7846) 2024-12-13 21:25:13 +08:00
CHANGELOG.md release(crates): v0.40.0 (#7775) 2024-12-10 23:04:43 +08:00
README.md chore(doc): replace main/master to tag/commit to make the url always accessible (#7298) 2024-11-16 21:00:30 +08:00

README.md

Minifier

A JavaScript minifier has three components:

  1. printer
  2. mangler
  3. compressor

Mangler

The mangler implementation is part of the SymbolTable residing in oxc_semantic. It is responsible for shortening variables. Its algorithm should be gzip friendly.

The printer is also responsible for printing out the shortened variable names.

Compressor

The compressor is responsible for rewriting statements and expressions for minimal text output. Terser is a good place to start for learning the fundamentals.

Terser Tests

The fixtures are copied from https://github.com/terser/terser/tree/v5.9.0/test/compress