Limits of Framework7 Router Navigation Guards for Aborting Page Transitions During Failed Upgrades

When an upgrade fails mid‑navigation, developers may rely on Framework7’s router navigation guards to abort the transition and roll back to the previous view, thereby preserving user context. However, the guard API changed between v5 and v6, and it is unclear whether the existing guard implementation remains compatible across versions or whether aborting a transition reliably restores the exact DOM state before the failed upgrade. Additionally, interacting with the guard may affect the page cache or theme system, potentially leaving the application in an inconsistent state.

What are the limits of using navigation guards for safe recovery after a failed upgrade? Does aborting a navigation transition guarantee restoration of the previous view’s state? Are there any unintended side effects on the page cache or theme system when a guard aborts navigation during an upgrade?