Bring back the warning

statelyai · Jan 27, 2023 · b0bb50d · b0bb50d
1 parent c6ef237
commit b0bb50d
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/packages/core/src/Machine.ts b/packages/core/src/Machine.ts
@@ -17,6 +17,9 @@ import {
   TypegenDisabled,
   ResolveTypegenMeta
 } from './typegenTypes';
+import { IS_PRODUCTION } from './environment';
+
+let warned = false;
 
 /**
  * @deprecated Use `createMachine(...)` instead.
@@ -139,5 +142,12 @@ export function createMachine<
   TServiceMap,
   TTypesMeta
 > {
+  if (!IS_PRODUCTION && !('predictableActionArguments' in config) && !warned) {
+    warned = true;
+    console.warn(
+      'It is highly recommended to set `predictableActionArguments` to `true` when using `createMachine`. https://xstate.js.org/docs/guides/actions.html'
+    );
+  }
+
   return new StateNode(config, options as any) as any;
 }