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Reject top-level un-scoped selectors with SyntaxError when pure mode is enabled in Lightning CSS modules configuration

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

ゴール: Reject top-level un-scoped selectors with SyntaxError when pure mode is enabled in Lightning CSS modules configuration HOW
パッケージ: lightningcss 1.33.0
環境: node
作成日: 2026-08-17T10:23:24Z

compiling pure CSS modules silently drops top-level element selectors or emits them unchanged as global styles without error

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。

transform with cssModules.pure set to true throws a SyntaxError stating that a selector in CSS modules should contain at least one class or ID selector when encountering impure element selectors
transform with cssModules.pure set to true compiles successfully when every selector contains at least one class or ID selector
transform with default cssModules configuration (pure: false) compiles impure element selectors without throwing an error
exports maps each scoped class and ID to an object containing name, composes, and isReferenced rather than a bare string

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