From 1ef17d04ddd82775956dc9173a02e69c9d15dcd1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=B1=B1=E5=90=B9=E8=89=B2=E5=BE=A1=E5=AE=88?=
 <85992002+KazariEX@users.noreply.github.com>
Date: Wed, 30 Oct 2024 16:18:21 +0800
Subject: [PATCH] fix(language-core): generate style modules type as needed
 (#4953)

---
 .../language-core/lib/codegen/script/styleModulesType.ts    | 2 +-
 test-workspace/tsc/passedFixtures/vue3/cssModule/empty.vue  | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 test-workspace/tsc/passedFixtures/vue3/cssModule/empty.vue

diff --git a/packages/language-core/lib/codegen/script/styleModulesType.ts b/packages/language-core/lib/codegen/script/styleModulesType.ts
index 8ddd9b89fb..f23a7addfa 100644
--- a/packages/language-core/lib/codegen/script/styleModulesType.ts
+++ b/packages/language-core/lib/codegen/script/styleModulesType.ts
@@ -9,7 +9,7 @@ export function* generateStyleModulesType(
 	ctx: ScriptCodegenContext
 ): Generator<Code> {
 	const styles = options.sfc.styles.map((style, i) => [style, i] as const).filter(([style]) => style.module);
-	if (!styles.length) {
+	if (!styles.length && !options.scriptSetupRanges?.cssModules.length) {
 		return;
 	}
 	yield `type __VLS_StyleModules = {${newLine}`;
diff --git a/test-workspace/tsc/passedFixtures/vue3/cssModule/empty.vue b/test-workspace/tsc/passedFixtures/vue3/cssModule/empty.vue
new file mode 100644
index 0000000000..cd1d21d462
--- /dev/null
+++ b/test-workspace/tsc/passedFixtures/vue3/cssModule/empty.vue
@@ -0,0 +1,6 @@
+<script lang="ts" setup>
+import { useCssModule } from 'vue';
+
+// @ts-expect-error
+useCssModule();
+</script>
\ No newline at end of file