fix(transformer/class): replace new.target in static blocks#22360
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new.target in static blocks
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Pull request overview
Fixes an ES2022 class-properties transformer edge case where new.target inside class static blocks (and static initialization contexts being moved out of the class body) must evaluate to undefined, ensuring transformed output matches Babel/Test262 expectations.
Changes:
- Replace
new.targetwithvoid 0during static block/property initializer rewriting before hoisting code outside the class. - Update Babel transform conformance and execution snapshots to reflect the newly passing
new.targetscenario. - Update transformer coverage snapshots (Babel + Test262) to reflect the additional passing case.
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Copilot reviewed 3 out of 5 changed files in this pull request and generated no comments.
Show a summary per file
| File | Description |
|---|---|
| tasks/transform_conformance/snapshots/babel.snap.md | Updates Babel conformance snapshot counts and removes the prior new-target mismatch for class static blocks. |
| tasks/transform_conformance/snapshots/babel_exec.snap.md | Updates exec snapshot counts and removes the prior new-target failing execution fixture entry. |
| tasks/coverage/snapshots/transformer_test262.snap | Updates Test262 transformer coverage to show the static-init-expr-new-target case now passing. |
| tasks/coverage/snapshots/transformer_babel.snap | Updates Babel transformer coverage to reflect one fewer mismatch related to new-target. |
| crates/oxc_transformer/src/es2022/class_properties/static_block_and_prop_init.rs | Implements new.target → void 0 replacement in the static initializer/static block visitor prior to hoisting. |
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overlookmotel
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May 15, 2026
### 🚀 Features - bc91a17 codegen: Expose `Codegen::with_source_type` method (#22432) (camc314) ### 🐛 Bug Fixes - 5ac7e79 minifier: Drop unused-var-init pure IIFEs and preserve annotation for downstream (#22349) (Dunqing) - 4ab57eb allocator: Fixed-size allocators use `VirtualAlloc` on Windows (#22124) (overlookmotel) - 66d77eb allocator: Fix segfault on Linux MUSL with fixed-size allocators (#22388) (overlookmotel) - b8fbc1f transformer/object-rest-spread: Correct scope id when moving bindings (#22419) (camc314) - 18edc2c codegen: Keep `Object.defineProperty` property name as plain string in minify (#22400) (Dunqing) - dda33de transformer/explicit-resource-management: Align lexical binding scopes (#22320) (camc314) - 8e79de8 transformer: Preserve for-await statement bodies (#22361) (camc314) - 0cba210 transformer/class: Replace `new.target` in static blocks (#22360) (camc314) - 67ab1c9 transformer/es2018/for-await: Hoist for-await generated bindings (#22355) (camc314) - c3ceb4a transformer/object-rest-spread: Use hoisted scope for `for-of` temp refs (#22347) (camc314) ### ⚡ Performance - 73a9043 allocator/bitset: Avoid temp heap `String` allocation (#22403) (camc314) - 8b2f4f9 transformer/object-rest-spread: Collect `Vec<SymbolId` over `Vec<BindingIdentifier>` (#22418) (camc314) - 83679ea parser: Split TriviaBuilder::handle_token hot/cold paths (#22415) (Boshen) - 2c7d781 codegen: Inline identifier-name accessors (#22411) (Boshen) - 618bc76 diagnostics: Inline `OxcDiagnosticInner` to avoid heap allocation (#22406) (Boshen) - 0b4e158 parser: Reserve cap `2` for sequence expressions vec (#22374) (camc314) - 5f3bdd0 codegen: Add `#[inline]` to `code`, `code_len` (#22373) (camc314) Co-authored-by: overlookmotel <557937+overlookmotel@users.noreply.github.com>
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