JavaScript Lesson 21 | Web Storage | LocalStorage, SessionStorage and Cookies

#javascript #localstorage #cookies Lesson 21: Web storage in JavaScript: LocalStorage, SessionStorage and Cookies. Learn setItem/getItem, storing objects with JSON.stringify/JSON.parse, removeItem and clear, sessionStorage basics, and cookie helpers (set/get/remove). Includes practical console demos and code patterns for storing user prefs, visit counts and simple session data. What you’ll learn: • LocalStorage API: localStorage.setItem/getItem/removeItem/clear. • Storing objects: JSON.stringify before saving, JSON.parse after reading. • SessionStorage usage: session-based storage that clears on tab close. • Cookies: set, get and remove cookie patterns (expires, path). • Use-cases: user preferences, theme, visitCount, sessionId, small state storage. • Security & size notes: don’t store secrets; localStorage is string-only and limited in size.