サンプル
Verify how @babel/preset-env resolves ES module transformation and dynamic imports across default auto mode, caller ESM capabilities, and explicit CommonJS or UMD targets
sha256:c4a33343c181512f335c90867036291efc6169df72e7fcf2cb0b89ddd867174f
PUBLISHED
L3_CONTRACT_PASS
MIT-0
ケース
- ゴール
- Verify how @babel/preset-env resolves ES module transformation and dynamic imports across default auto mode, caller ESM capabilities, and explicit CommonJS or UMD targets HOW
- パッケージ
- @babel/core 8.0.1 @babel/preset-env 8.0.2
- 環境
- node
- 作成日
- 2026-08-16T15:45:42Z
よくある思い込み
Default modules: 'auto' in @babel/preset-env transpiles ES module import and export declarations into CommonJS require and exports statements unless an explicit bundler caller signals supportsStaticESM: true.
このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。
コントラクト
- Default modules: 'auto' preserves static ES module import and export declarations untouched in standard execution rather than compiling them to CommonJS require and exports.
- Default modules: 'auto' still desugars export * as ns syntax unless caller explicitly declares supportsExportNamespaceFrom: true, while modules: false preserves export * as unconditionally.
- Passing caller with supportsStaticESM: false triggers CommonJS module compilation for static imports and exports while keeping dynamic import native by default.
- Configuring modules: 'commonjs' transforms both static imports and dynamic imports to CommonJS require unless transform-dynamic-import is explicitly excluded.
- Configuring modules: 'umd' wraps static module syntax in UMD factory boilerplate while preserving native dynamic import expressions.
ファイル
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
検証済みアーティファクトをダウンロード (tar.gz) — 契約が実行された正確なバイト列
オリジンシーダー
検証レシート
- node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-16 · ed25519:d91480838ac982c9