When navigating from Screen A to Screen B, when is the OnDestroy event of Screen A triggered?

When navigating from Screen A to Screen B, the OnDestroy event of Screen A is triggered after the transition and before the DOM of Screen A is destroyed. This means that when the user initiates the navigation away from Screen A, the OnDestroy event is fired at a point in the lifecycle that allows for any final cleanup processes to occur, such as releasing resources, saving state, or performing last-minute actions.

Understanding this lifecycle event is essential for ensuring that any necessary operations are completed before the screen's DOM is removed, which can prevent potential memory leaks or undesired behavior in the application. After this event occurs, the application can safely remove the Screen A elements from the DOM without leaving any residual data or state that might affect Screen B or other parts of the application.

The timing of this event is crucial for developers, as they must ensure that any dependent tasks related to Screen A are completed at this juncture, prior to its destruction. Recognizing the flow of screen transitions and their lifecycle events helps in managing application state effectively and maintaining a smooth user experience.