onBeforeRouteEnter support

[qaz4042]

I really need the onBeforeRouteEnter hook.
eg:
Before entering page A, load some dictionary data.
Before entering page B, load some other dictionary data.

Such a common demand.

I think the basic system such as vue3 setup should continue to support onBeforeRouteEnter.
Writing a bunch of code in the route, such a messy coupling, the maintainability is worrying

[posva]

This has become data loaders.
You can search onbeforerouteenter in router repository for more info.