Description: IsExpired is a property that indicates whether a resource has expired. In the context of web development and programming, this property is used to manage the validity of certain objects or data. Expiration can refer to user sessions, authentication tokens, or even cached data. Implementing this property allows developers to set conditions under which a resource is no longer accessible or relevant, which is crucial for maintaining the security and integrity of applications. By checking if a resource is expired, informed decisions can be made about the need to renew or delete it, thus optimizing performance and user experience. Furthermore, this property can be part of a broader state management system, where transitions between different states of a resource are controlled, ensuring that only valid and up-to-date data is used across applications.