Local Storage
Local Storage is a web browser API that allows web applications to store key-value pairs persistently in a user's browser. It provides a simple, synchronous storage mechanism with no expiration date, meaning data persists across browser sessions and page reloads. Unlike cookies, it has a larger storage capacity (typically 5-10 MB per origin) and data is not sent to the server with every HTTP request.
Developers should use Local Storage for storing non-sensitive client-side data that needs to persist between sessions, such as user preferences, theme settings, or form data drafts. It's ideal for offline web applications, caching static assets, and improving performance by reducing server requests for frequently accessed data. However, it should not be used for sensitive information like passwords or authentication tokens due to security vulnerabilities like XSS attacks.