Callback functions

Author: ShubhamSKadam

12_Asynchronous_Concepts/12.md

@@ -37,7 +37,19 @@ const functionTwo = () => {
 
 ```
 
-```
+#### Callback functions
+
+```js
+// Callback functions
+
+const fetchUser = (username, callback) => {
+    setTimeout(() => {
+        callback({ username });
+    }, 2000);
+};
 
+fetchUser("Shubham", (user) => {
+    console.log(`Hello, ${user.username}`); // Hello, Shubham
+});
 ```
 

12_Asynchronous_Concepts/script2.js

@@ -0,0 +1,12 @@
+// Callback functions
+
+const fetchUser = (username, callback) => {
+    console.log("Fetching...");
+    setTimeout(() => {
+        callback({ username });
+    }, 2000);
+};
+
+fetchUser("Shubham", (user) => {
+    console.log(`Hello, ${user.username}`);
+});