Provide a mechanism for handling duplicate navigation

[mrts]

What problem does this feature solve?

A mechanism is needed for handling duplicate navigation.

This has been requested in vuejs/vue-router#974.

The following comment vuejs/vue-router#974 (comment) has received 57 upvotes:

Vue Router should respect the "default" behavior of any "normal" link.

On a simple HTML page, when clicking on the link of the page we already are on, the page reload. And I think Vue Router should not alter this default behavior, because it's what most user using the web is expecting.

What does the proposed API look like?

Another comment vuejs/vue-router#974 (comment) that has received 33 upvotes, suggests providing a new configuration option duplicateNavigationPolicy that provides reload, reject and ignore policies for handling duplicate navigation. The proposed API looks as follows:

const router = new Router({
    duplicateNavigationPolicy: 'reload' // or 'ignore', 'reject', or maybe a callable
})

[posva]

Please don't open duplicates