Full support for anchor tags

[Overdrivr]

What problem does this feature solve?

Anchor tags cannot be implemented correctly in the current state of things. There are a few techniques to hack a way around, but none of them seem to cover all the following cases:

• Paths with anchors should always lead to the anchor if reached multiple times (currently, only the first time works, even by refreshing the page)
• Anchor tags urls should be shareable (users should be capable of bookmarking/sharing URLs, in a way that the URL will lead them back directly to the anchor)

AFAIK, there two solutions currently that partially support those requirements: vue-router Scroll behavior that does not support first requirement in a robust manner, and vue-scrollto that does not support second requirement since it's just scrolling without any sense of routing/url.

What does the proposed API look like?

The API is already there, using the hash field

<router-link :to="{name: 'SomeVue', hash:'#anchor'}">Link to anchor</router-link>

// or

<a href="/somevue#anchor>Link to anchor</a>

<div id="anchor">Anchor</div>

We only need to implement the proper behavior for supporting use cases presented above.

[posva]

Duplicate of #1668