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oxc/crates/oxc_minifier
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oxc-bot 80118cbf3b
Release crates v0.22.1 (#4508) 
## [0.22.1] - 2024-07-27

### Features

- 2477330 ast: Add `AstKind::TSExportAssignment` (#4501) (Dunqing)
- aaee07e ast: Add `AstKind::AssignmentTargetPattern`,
`AstKind::ArrayAssignmentTarget` and `AstKind::ObjectAssignmentTarget`
(#4456) (Dunqing)
- fd363d1 ast: Add AstKind::get_container_scope_id (#4450) (DonIsaac)
- e2735ca span: Add `contains_inclusive` method (#4491) (DonIsaac)

### Bug Fixes

- 368112c ast: Remove `#[visit(ignore)]` from
`ExportDefaultDeclarationKind`'s `TSInterfaceDeclaration` (#4497)
(Dunqing)
- 36bb680 semantic: `TSExportAssignment` cannot reference type binding
(#4502) (Dunqing)
- cb2fa49 semantic: `typeof` operator cannot reference type-only import
(#4500) (Dunqing)
- ef0e953 semantic: Generic passed to typeof not counted as a reference
(#4499) (Dunqing)
- 40cafb8 semantic: Params in `export default (function() {})` flagged
as `SymbolFlags::Export` (#4480) (Dunqing)
- 2e01a45 semantic: Non-exported namespace member symbols flagged as
exported (#4493) (Don Isaac)
- e4ca06a semantic: Incorrect symbol’s scope_id after var hoisting
(#4458) (Dunqing)
- 77bd5f1 semantic: Use correct span for namespace symbols (#4448) (Don
Isaac)
- 5db7bed sourcemap: Fix pre-calculation of required segments for
building JSON (#4490) (overlookmotel)
- 1667491 syntax: Correct `is_reserved_keyword_or_global_object`'s
incorrect function calling. (#4484) (Ethan Goh)
- 82ba2a0 syntax: Fix unsound use of `NonZeroU32` (#4466)
(overlookmotel)
- c04b9aa transformer: Add to `SymbolTable::declarations` for all
symbols (#4460) (overlookmotel)
- ecdee88 transformer/typescript: Incorrect eliminate exports when the
referenced symbol is both value and type (#4507) (Dunqing)

### Performance

- 963a2d1 mangler: Reduce unnecessary allocation (#4498) (Dunqing)
- 868fc87 parser: Optimize conditional advance on ASCII values (#4298)
(lucab)
- 24beaeb semantic: Give `AstNodeId` a niche (#4469) (overlookmotel)
- 348c1ad semantic: Remove `span` field from `Reference` (#4464)
(overlookmotel)
- 6a9f4db semantic: Reduce storage size for symbol redeclarations
(#4463) (overlookmotel)
- 705e19f sourcemap: Reduce memory copies encoding JSON (#4489)
(overlookmotel)
- 4d10c6c sourcemap: Pre allocate String buf while encoding (#4476)
(Brooooooklyn)

### Documentation

- f5f0ba8 ast: Add doc comments to more AST nodes (#4413) (Don Isaac)
- 871b3d6 semantic: Add doc comments for SymbolTester and SemanticTester
(#4433) (DonIsaac)

### Refactor

- 9c5d2f9 ast/builder: Use `Box::new_in` over `.into_in` (#4428)
(overlookmotel)
- ccb1835 semantic: Methods take `Span` as param, not `&Span` (#4470)
(overlookmotel)
- f17254a semantic: Populate `declarations` field in
`SymbolTable::create_symbol` (#4461) (overlookmotel)
- a49f491 semantic: Re-order `SymbolTable` fields (#4459)
(overlookmotel)
- 7cd53f3 semantic: Var hoisting (#4379) (Dunqing)
- 4f5a7cb semantic: Mark SemanticTester and SymbolTester as must_use
(#4430) (DonIsaac)
- c958a55 sourcemap: `push_list` method for building JSON (#4486)
(overlookmotel)
- c99b3eb syntax: Give `ScopeId` a niche (#4468) (overlookmotel)
- 96fc94f syntax: Use `NonMaxU32` for IDs (#4467) (overlookmotel)

### Testing

- 4b274a8 semantic: Add more test cases for symbol references (#4429)
(DonIsaac)

Co-authored-by: Boshen <1430279+Boshen@users.noreply.github.com>
2024-07-28 09:58:29 +08:00
..
examples chore: move mangler example to minifier (#4343) 2024-07-18 06:27:16 +00:00
src feat(minifier): compress typeof foo == "undefined" into typeof foo > "u" (#4412) 2024-07-22 12:44:33 +00:00
tests chore(codegen): port over esbuild codegen tests (all ignored right now) (#4457) 2024-07-25 10:00:34 +00:00
Cargo.toml Release crates v0.22.1 (#4508) 2024-07-28 09:58:29 +08:00
CHANGELOG.md Release crates v0.22.0 (#4434) 2024-07-24 08:23:27 +08:00
README.md

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/master/test/compress