types(n4s): add isUndefined type guard

ealush · Jun 13, 2022 · 44721e6 · 44721e6 · vercel · Jun 13, 2022
1 parent b062abb
commit 44721e6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/n4s/src/rules/isUndefined.ts b/packages/n4s/src/rules/isUndefined.ts
@@ -1,6 +1,6 @@
 import bindNot from 'bindNot';
 
-export function isUndefined(value?: unknown): boolean {
+export function isUndefined(value?: unknown): value is undefined {
   return value === undefined;
 }