Web Storage
Web Storage is a web browser API that allows websites to store data locally on a user's device, providing a simple key-value storage mechanism. It enables persistent data storage across browser sessions, unlike cookies which are sent with every HTTP request. The API includes two main objects: localStorage for long-term storage and sessionStorage for data that lasts only during a browser session.
Developers should use Web Storage when they need to store non-sensitive data client-side, such as user preferences, form data, or application state, to improve performance and user experience by reducing server requests. It's particularly useful for offline web applications, caching data, and maintaining state in single-page applications (SPAs) without relying on cookies. However, it should not be used for sensitive information like passwords or tokens due to security limitations.