Using LocalStorage and SessionStorage

LocalStorage and SessionStorage are browser-based APIs for storing key-value data client-side. LocalStorage persists data even after browser closure, suitable for user preferences and settings. SessionStorage only retains data during a single browser session, ideal for temporary information like shopping carts. Both APIs offer easy-to-use methods like `setItem()`, `getItem()`, `removeItem()`, and `clear()`. They provide performance advantages over server requests and reduce server load. However, storage capacity is limited, typically around 5MB, and security concerns exist as data is accessible to same-origin JavaScript. Complex data structures are not directly supported. The example code demonstrates setting and retrieving data using both APIs. Choosing between LocalStorage and SessionStorage depends on the data's persistence requirement. For larger datasets or sensitive data, alternative storage solutions are recommended. Both APIs significantly enhance user experience when used appropriately. Careful consideration of limitations and security is paramount.