fix: check string value in isUpperCase (#1542)

* fix: check string value in isUpperCase * Create small-shrimps-vanish.md --------- Co-authored-by: Sami Jaber <[email protected]>
BuilderIO · Sep 3, 2024 · 531c15c · 531c15c
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diff --git a/.changeset/small-shrimps-vanish.md b/.changeset/small-shrimps-vanish.md
@@ -0,0 +1,5 @@
+---
+"@builder.io/mitosis": patch
+---
+
+fix: check string value in `isUpperCase`
diff --git a/packages/core/src/helpers/is-upper-case.ts b/packages/core/src/helpers/is-upper-case.ts
@@ -1 +1 @@
-export const isUpperCase = (str: string) => str.toUpperCase() === str;
+export const isUpperCase = (str: string) => typeof str === 'string' && str.toUpperCase() === str;