CamelCase: Fix handling of non-literal strings (#531)

sindresorhus · Dec 25, 2022 · 00b13f8 · 00b13f8
1 parent 9f04028
commit 00b13f8
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/source/camel-case.d.ts b/source/camel-case.d.ts
@@ -74,5 +74,7 @@ const dbResult: CamelCasedProperties<RawOptions> = {
 @category Template literal
 */
 export type CamelCase<Type, Options extends CamelCaseOptions = {preserveConsecutiveUppercase: true}> = Type extends string
-	? Uncapitalize<CamelCaseFromArray<SplitWords<Type extends Uppercase<Type> ? Lowercase<Type> : Type>, Options>>
+	? string extends Type
+		? Type
+		: Uncapitalize<CamelCaseFromArray<SplitWords<Type extends Uppercase<Type> ? Lowercase<Type> : Type>, Options>>
 	: Type;
diff --git a/test-d/camel-case.ts b/test-d/camel-case.ts
@@ -75,3 +75,6 @@ expectType<CamelCase<'fooBARBiz', {preserveConsecutiveUppercase: false}>>('fooBa
 
 expectType<CamelCase<'foo BAR-Biz_BUZZ'>>('fooBARBizBUZZ');
 expectType<CamelCase<'foo BAR-Biz_BUZZ', {preserveConsecutiveUppercase: false}>>('fooBarBizBuzz');
+
+expectType<CamelCase<string>>('string' as string);
+expectType<CamelCase<string, {preserveConsecutiveUppercase: false}>>('string' as string);