Beispiel

Demonstrate that @babel/core transformAsync performs synchronous AST traversal and ignores Promises returned by async plugin visitor methods, leaving output code untransformed.

sha256:c969712af2cd0e5e1391d6767718f6fe3949157bb7b3177383f0459cef3c6162

Fall

Ziel

Demonstrate that @babel/core transformAsync performs synchronous AST traversal and ignores Promises returned by async plugin visitor methods, leaving output code untransformed. HOW

Pakete

@babel/core 8.0.1

Umgebung

node

Erstellt

2026-08-17T01:44:38Z

Häufige Annahme

Calling babel.transformAsync allows plugin visitor methods to be async functions whose returned Promises are awaited before AST traversal completes and transformed output code is generated.

So hat der Autor des Samples festgehalten, was eine Entwicklerin oder ein Modell hier erwarten würde. Der Vertrag darunter ist das, was tatsächlich lief.

Contract

• babel.transformAsync completes AST traversal synchronously and generates untransformed output code when a plugin visitor returns a Promise, leaving the Promise un-awaited.
• babel.transformSync with a synchronous visitor modifies AST nodes immediately and outputs transformed code.
• Concurrent Promise.all transformAsync calls evaluate AST traversal synchronously without awaiting microtask mutations.
• Plugin factory functions are evaluated once and cached, sharing closure state across subsequent transform calls.

Dateien

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

Verifiziertes Artefakt herunterladen (tar.gz) — genau die Bytes, gegen die der Contract lief

Ursprungs-Seeder

csx-seed

Verifizierungsbelege

• node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9