fix: safety about null

tkow · Nov 1, 2018 · c17dba2 · c17dba2
1 parent 35cb03b
commit c17dba2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/lib/index.ts b/src/lib/index.ts
@@ -73,7 +73,7 @@ class ValidationWatcher {
       this.internal.errorStateId = errorStateId;
     }
     return (state, action) => {
-      if (errorStateId in state) {
+      if (state && errorStateId in state) {
         delete state[errorStateId];
       }
       const nextState = reducer(state, action);