From c38c66a446287921eb466c863c8b1136d23ecc78 Mon Sep 17 00:00:00 2001
From: "jason.zhu" <jason.zhu@xero.com>
Date: Wed, 12 May 2021 11:45:47 +1000
Subject: [PATCH] Module1: How Closures Work

---
 app.js | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/app.js b/app.js
index 12e7f3d..6788a32 100644
--- a/app.js
+++ b/app.js
@@ -1,5 +1,12 @@
-let message = 'Hello';
-if (message === 'Hello') {
-    var count = 100; // var is within global scope, when it's not within object or function
+function setupCounter(val) {
+    return function counter() {
+        return val++;
+    }
 }
-console.log(count); // No reference error, which is dangerous
\ No newline at end of file
+
+let counter1 = setupCounter(0);
+console.log(counter1());
+console.log(counter1());
+let counter2 = setupCounter(10);
+console.log(counter2());
+console.log(counter2());
\ No newline at end of file