samesession

samesession is a JavaScript library that provides a simple and efficient way to manage session data across different browser tabs or windows originating from the same domain. It leverages the browser's built-in Broadcast Channel API to facilitate cross-tab communication. When data is set or updated in one tab using samesession, a message is broadcast to all other open tabs for that domain, allowing them to synchronize their session state automatically.

The primary use case for samesession is to maintain a consistent user experience and data integrity when a user interacts with an application across multiple tabs. For instance, if a user logs in on one tab, other open tabs for the same website can detect the login status and update their UI accordingly without requiring a page refresh or explicit re-authentication. Similarly, changes to user preferences, shopping cart contents, or application state can be propagated across tabs.

samesession offers a straightforward API, typically involving methods to set, get, and clear session data, similar to the browser's native localStorage or sessionStorage. However, unlike these browser APIs which are tab-specific, samesession enables shared state management. It is designed to be lightweight and non-intrusive, aiming to simplify the development of complex, multi-tab web applications. The library handles the underlying complexities of the Broadcast Channel API, making it accessible to developers without requiring deep knowledge of cross-tab communication mechanisms.