Hello.

The Page Lifecycle API introduces lifecycle states to the web, giving developers control over how their web apps respond to browser actions like tab unloading and backgrounding. This addresses the historical lack of lifecycle management on the web, which has hindered resource optimization, especially on low-powered devices. The API defines system-initiated states for hidden or inactive tabs, allowing browsers to limit resource consumption. Developers gain control through new APIs and events, enabling them to save state before the browser reclaims resources, such as memory, battery, and network. This collaboration between developers and browsers ultimately improves the user experience by increasing web page reliability and responsiveness.