feat: add cookies

Author: ExploitEngineer

part9 (Advanced Topics)/client-side-storage/cookies.js

@@ -0,0 +1,18 @@
+/*
+INFO: Cookies
+Small pieces of data stored in the browser and sent with every HTTP request to the same origin
+
+INFO: Key features:
+1. Small (max-4KB)
+2. Used for authentication, tracking, etc.
+3. Can have expiration, domain, path, and secure flags
+4. Accessible via document.cookie.
+*/
+
+document.cookie = "username=rafay; expires=Fri, 31 Dec 2025 23:59:59 GMT; path=/";
+
+console.log(document.cookie); // "username=rafay"
+
+document.cookie = "username=admin";
+
+document.cookie = "username=; expires=Thu, 01 Jan 1970 00:00:00 UTC;";