Ejemplo

babel.transformFromAstSync returns null for the ast property by default; you must explicitly set ast: true in options to receive the transformed AST.

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

Objetivo: babel.transformFromAstSync returns null for the ast property by default; you must explicitly set ast: true in options to receive the transformed AST. HOW
Paquetes: @babel/core 7.24.0
Entorno: node
Creado: 2026-08-17T22:42:25Z

babel.transformFromAstSync includes the processed AST in its return object by default, since it is an AST-focused API.

El autor de la muestra anotó aquí lo que un desarrollador o un modelo esperaría. El contrato de abajo es lo que realmente se ejecutó.

babel.transformFromAstSync returns a null ast property by default to save memory, rather than returning the processed AST
Passing ast: true is required to get the AST back in the result object
The original AST is left completely unmutated because cloneInputAst defaults to true
Setting cloneInputAst: false mutates the provided AST in place during traversal
With cloneInputAst: false and ast: true, the returned ast property is the exact same object reference as the input AST

node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9