fix(core): ensure observe prop is defined before calling defineProper…

…ty (#3666) fix #3631
ngx-formly · May 1, 2023 · d8cafc8 · d8cafc8
1 parent 1dd5c6e
commit d8cafc8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/core/src/lib/utils.ts b/src/core/src/lib/utils.ts
@@ -276,7 +276,7 @@ export function observe<T = any>(o: IObserveTarget<T>, paths: string[], setFn: I
   if (state.onChange.indexOf(setFn) === -1) {
     state.onChange.push(setFn);
     setFn({ currentValue: state.value, firstChange: true });
-    if (state.onChange.length >= 1) {
+    if (state.onChange.length >= 1 && isObject(target)) {
       const { enumerable } = Object.getOwnPropertyDescriptor(target, key) || { enumerable: true };
       Object.defineProperty(target, key, {
         enumerable,