Module1: How Closures Work

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
+
+let counter1 = setupCounter(0);
+console.log(counter1());
+console.log(counter1());
+let counter2 = setupCounter(10);
+console.log(counter2());
+console.log(counter2());