1 files changed, 27 insertions, 0 deletions
diff --git a/devtools/client/netmonitor/src/reducers/batching.js b/devtools/client/netmonitor/src/reducers/batching.js
new file mode 100644
index 0000000000..bc4f02beb2
--- /dev/null
+++ b/devtools/client/netmonitor/src/reducers/batching.js
@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+const {
+  BATCH_ACTIONS,
+} = require("resource://devtools/client/netmonitor/src/constants.js");
+
+/**
+ * A reducer to handle batched actions. For each action in the BATCH_ACTIONS array,
+ * the reducer is called successively on the array of batched actions, resulting in
+ * only one state update.
+ */
+function batchingReducer(nextReducer) {
+  return function reducer(state, action) {
+    switch (action.type) {
+      case BATCH_ACTIONS:
+        return action.actions.reduce(reducer, state);
+      default:
+        return nextReducer(state, action);
+    }
+  };
+}
+
+module.exports = batchingReducer;