Router cancellation

[tomonari-t]

In my application, I want to prevent user page transitions at form page.

Now I'm able to prevent page transitions that user clicking <Link> or Router.push('').
But it is not possible that preventing page transitions by clicking browser back button or refresh button.

It's very frustrating to lose data while filling out a form. And it often happens.

I'd prefer an official API for handling situations like confirming navigation.

How about everyone?

Related Issue

#2476

[StarpTech]

Can be elegantly solved by #11822

[tomonari-t]

@StarpTech
Awesome !