From 45281b6b3f6bfe69ceb2450c2c48961e2891d2c9 Mon Sep 17 00:00:00 2001
From: Tim Dorr <git@timdorr.com>
Date: Mon, 23 Dec 2019 21:16:12 -0500
Subject: [PATCH 1/3] 4.0.5

---
 package-lock.json | 2 +-
 package.json      | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index 1a2d4a32c4..892a707bf0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "redux",
-  "version": "4.0.4",
+  "version": "4.0.5",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 6dc69e8d77..d8bafaa9d8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "redux",
-  "version": "4.0.4",
+  "version": "4.0.5",
   "description": "Predictable state container for JavaScript apps",
   "license": "MIT",
   "homepage": "http://redux.js.org",

From 8c11bbd082894b057639a9bb03f80b2d12bd8bbb Mon Sep 17 00:00:00 2001
From: Moshe Zemah <moshe@monday.com>
Date: Mon, 3 Aug 2020 18:15:00 +0300
Subject: [PATCH 2/3] Notify listeners (subscribers) on next frame if needed

---
 src/createStore.js | 41 +++++++++++++++++++++++++++++++++++------
 1 file changed, 35 insertions(+), 6 deletions(-)

diff --git a/src/createStore.js b/src/createStore.js
index cef9a2ecae..35cf61b0ef 100644
--- a/src/createStore.js
+++ b/src/createStore.js
@@ -62,6 +62,8 @@ export default function createStore(reducer, preloadedState, enhancer) {
   let currentListeners = []
   let nextListeners = currentListeners
   let isDispatching = false
+  var isNotifyListenersNextFrame = false
+  var alreadyNotifingListenersOnNextFrame = false
 
   /**
    * This makes a shallow copy of currentListeners so we can use
@@ -156,6 +158,18 @@ export default function createStore(reducer, preloadedState, enhancer) {
     }
   }
 
+  /**
+   *
+   * @param {boolean} shouldNotifyOnNextFrame A boolean to configure the store
+   * to notify the listeners only on the next frame or after every dispatch.
+   * The state still keep changing between dispatches, only listeners (subscribers to store) don't run.
+   * Set to true if listeners should be notified only once per frame.
+   * Set to false (default) if listeners should be notified after every dispatch
+   */
+  function setNotifyListenersOnNextFrame(shouldNotifyOnNextFrame) {
+    isNotifyListenersNextFrame = shouldNotifyOnNextFrame
+  }
+
   /**
    * Dispatches an action. It is the only way to trigger a state change.
    *
@@ -207,10 +221,24 @@ export default function createStore(reducer, preloadedState, enhancer) {
       isDispatching = false
     }
 
-    const listeners = (currentListeners = nextListeners)
-    for (let i = 0; i < listeners.length; i++) {
-      const listener = listeners[i]
-      listener()
+    function notifyListeners() {
+      const listeners = (currentListeners = nextListeners)
+      for (let i = 0; i < listeners.length; i++) {
+        const listener = listeners[i]
+        listener()
+      }
+    }
+
+    if (isNotifyListenersNextFrame) {
+      if (!alreadyNotifingListenersOnNextFrame) {
+        alreadyNotifingListenersOnNextFrame = true
+        window.requestAnimationFrame(() => {
+          notifyListeners()
+          alreadyNotifingListenersOnNextFrame = false
+        })
+      }
+    } else {
+      notifyListeners()
     }
 
     return action
@@ -275,7 +303,7 @@ export default function createStore(reducer, preloadedState, enhancer) {
 
       [$$observable]() {
         return this
-      }
+      },
     }
   }
 
@@ -289,6 +317,7 @@ export default function createStore(reducer, preloadedState, enhancer) {
     subscribe,
     getState,
     replaceReducer,
-    [$$observable]: observable
+    setNotifyListenersOnNextFrame,
+    [$$observable]: observable,
   }
 }

From 0faedaf73c289f5363ebce83750af966ef67644e Mon Sep 17 00:00:00 2001
From: Moshe Zemah <moshe@monday.com>
Date: Mon, 3 Aug 2020 18:19:43 +0300
Subject: [PATCH 3/3] Notify listeners (subscribers) on next frame if needed

---
 src/createStore.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/createStore.js b/src/createStore.js
index 35cf61b0ef..ac44aff2bd 100644
--- a/src/createStore.js
+++ b/src/createStore.js
@@ -303,7 +303,7 @@ export default function createStore(reducer, preloadedState, enhancer) {
 
       [$$observable]() {
         return this
-      },
+      }
     }
   }
 
@@ -318,6 +318,6 @@ export default function createStore(reducer, preloadedState, enhancer) {
     getState,
     replaceReducer,
     setNotifyListenersOnNextFrame,
-    [$$observable]: observable,
+    [$$observable]: observable
   }
 }