From 17269d296bee35541e277f938d00b103a5dcc2f2 Mon Sep 17 00:00:00 2001
From: Romulo Almeida <romuloalmeida@Romulos-MacBook-Air.local>
Date: Thu, 19 Mar 2020 18:20:41 -0300
Subject: [PATCH] Added isEqual funcionality

---
 package.json |  1 +
 src/index.js | 20 ++++++++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/package.json b/package.json
index 5bb58f6..948dd19 100755
--- a/package.json
+++ b/package.json
@@ -43,6 +43,7 @@
     "format:check": "prettier --list-different \"**/*.{js,json,ts,md}\""
   },
   "dependencies": {
+    "is-equal": "^1.6.1",
     "object-path": "^0.11.3"
   },
   "devDependencies": {
diff --git a/src/index.js b/src/index.js
index ec6fcc8..645d101 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,4 +1,5 @@
-import {get} from 'object-path';
+import { get } from 'object-path';
+import isEqual from 'is-equal';
 
 const subscribers = {};
 
@@ -10,21 +11,28 @@ export function subscribe(key, cb) {
   }
 
   // return "unsubscribe" function
-  return function() {
+  return function () {
     subscribers[key] = subscribers[key].filter(s => s !== cb);
   };
 }
 
-export default function(store) {
+
+export default function (store, opts = { deep: true }) {
   let prevState = store.getState();
 
   store.subscribe(() => {
     const newState = store.getState();
 
     Object.keys(subscribers).forEach(key => {
-      if (get(prevState, key) !== get(newState, key)) {
-        subscribers[key].forEach(cb => cb(newState));
-      }
+      let prevValue = get(prevState, key);
+      let newValue = get(newState, key);
+
+      if(  (opts.deep && isEqual(prevValue, newValue)) 
+        || (prevValue == newValue) )
+        return false;
+
+      subscribers[key].forEach(cb => cb(newState));
+
     });
 
     prevState = newState;