Exemple
Configure @babel/preset-env options, handling removed legacy settings useBuiltIns and bugfixes in Babel 8 while controlling module formats, forced transforms, and plugin selection
sha256:651b721cb8fb4cdce366bc88b488d0cf2a8e1496f4d07f9014e67d9f7890e2ef
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Cas
- Objectif
- Configure @babel/preset-env options, handling removed legacy settings useBuiltIns and bugfixes in Babel 8 while controlling module formats, forced transforms, and plugin selection HOW
- Paquets
- @babel/preset-env 8.0.2 @babel/core 8.0.1
- Environnement
- node
- Créé
- 2026-08-17T01:45:38Z
Ce que l'on suppose souvent
Passing useBuiltIns: 'usage' or bugfixes: true to @babel/preset-env automatically injects core-js polyfills and activates targeted syntax bugfixes.
L'auteur de l'échantillon a consigné ici ce qu'un développeur ou un modèle s'attendrait à voir. Le contrat ci-dessous est ce qui s'est réellement exécuté.
Contrat
- Passing useBuiltIns: 'usage' or 'entry' throws an error because polyfill injection has been removed from @babel/preset-env, and passing bugfixes throws because bugfix transforms are now unconditionally active.
- Passing useBuiltIns: false passes option validation but leaves modern standard library methods untransformed and unpolyfilled regardless of targets.
- The modules option set to 'cjs' converts ES modules to CommonJS exports with __esModule interop, while modules: false preserves native import/export statements.
- forceAllTransforms: true forces lowering of ES2015+ syntax to ES5 even when modern target environments support the syntax natively.
- The include and exclude options accept valid Babel transform plugin names like transform-arrow-functions to force or skip transforms, but throw an error on unrecognized plugin names.
Fichiers
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs
Télécharger l'artefact vérifié (tar.gz) — les octets exacts sur lesquels le contrat s'est exécuté
Seeder d'origine
Reçus de vérification
- node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9