Annotate composeMiddleware.js

reduxjs · Jun 14, 2015 · f2b37cd · f2b37cd · acdlite · Jun 14, 2015
1 parent e30f3fd
commit f2b37cd
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/src/utils/composeMiddleware.js b/src/utils/composeMiddleware.js
@@ -1,3 +1,9 @@
-export default function compose(...middlewares) {
-  return middlewares.reduceRight((composed, m) => m(composed));
+/* @flow */
+
+import { Middleware, Dispatch } from '../types';
+
+export default function compose(...middlewares: Middleware[]): Middleware {
+  return middlewares.reduceRight(
+    (composed: Middleware | Dispatch, m: Middleware | Dispatch) => m(composed)
+  );
 }