retrigger

microsoft · Feb 20, 2020 · b8108af · b8108af
1 parent 808d4dd
commit b8108af
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/libraries/adaptive-expressions/src/builtInFunction.ts b/libraries/adaptive-expressions/src/builtInFunction.ts
@@ -1106,7 +1106,7 @@ export class BuiltInFunctions {
     }
 
     private static isNumber(instance: any): boolean {
-        return typeof instance === 'number' && !Number.isNaN(instance);
+        return instance !== undefined && instance !== null && typeof instance === 'number' && !Number.isNaN(instance);
     }
 
     private static isEmpty(instance: any): boolean {