Ejemplo

PostCSS executes synchronous visitor plugins inline via the lazy result .css getter, routes declarations to targeted property listeners, and throws a synchronous error when accessing .css before asynchronous plugins resolve

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Evidencia de ejecución

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Recibos de verificación1

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

Objetivo: PostCSS executes synchronous visitor plugins inline via the lazy result .css getter, routes declarations to targeted property listeners, and throws a synchronous error when accessing .css before asynchronous plugins resolve HOW
Paquetes: postcss 8.5.2
Entorno: node
Creado: 2026-08-17T17:28:36Z

Accessing LazyResult.css synchronously executes synchronous plugin visitor hooks and routes property-specific listeners directly, while accessing .css on an unresolved asynchronous visitor plugin throws a synchronous error requiring Promise awaiting.
Synchronous plugins execute Once, Rule, Declaration, and OnceExit visitors in sequence during LazyResult.css evaluation.
Targeted Declaration listeners defined by property name (e.g. Declaration.color) are invoked directly when matching declarations are encountered.
Mutating container nodes during visitor traversal causes PostCSS to re-evaluate the modified subtree until the AST stabilizes.
Synchronous access to LazyResult.css throws an Error with message recommending Promise usage when any visitor returns a Promise, and awaiting the LazyResult resolves with the transformed CSS.

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