onBeforeRouteUpdate 
ts
function onBeforeRouteUpdate(hook): RouteHookRemoveRegisters a hook that is called before a route is updated. Must be called from setup. This is particularly useful for handling changes in route parameters or query while staying within the same component.
Parameters 
| Parameter | Type | 
|---|---|
hook | BeforeRouteHook | 
Returns 
A function that removes the added hook.