What problem does this feature solve?

I am trying to create a single page mobile app with a push/pop/modal navigation. This navigation behavior is similar to the iOS SDK's navigation controller behavior.
To get this to work in my code I have added a new field(navigationType: push | pop | modal) in the params object. Then in router.afterEach I check for this new field.

It would be nice to have this be part of the vue router api. Considering the push/replace is already separate API.

What does the proposed API look like?

usage might be:
router.afterEach((to, from) => {
if(to.navigationType == 'push'){
} else if(to.navigationType == 'replace'){
}
}