refine type checking

Co-authored-by: Evan Jacobs <570070+quantizor@users.noreply.github.com>
jaredpalmer · Apr 22, 2024 · 733240f · 733240f
1 parent 4d610a6
commit 733240f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/formik/src/Formik.tsx b/packages/formik/src/Formik.tsx
@@ -608,7 +608,7 @@ export function useFormik<Values extends FormikValues = FormikValues>({
       let parsed;
       // If the first argument is not a string though, it has to be a synthetic React Event (or a fake one),
       // so we handle like we would a normal HTML change event.
-      if (!isString(eventOrTextValue) && typeof eventOrTextValue !== 'number' && typeof eventOrTextValue !== 'boolean') {
+      if (typeof eventOrTextValue === 'object' && 'nativeEvent' in eventOrTextValue && eventOrTextValue.nativeEvent instanceof Event) {
         // If we can, persist the event
         // @see https://reactjs.org/docs/events.html#event-pooling
         if ((eventOrTextValue as any).persist) {