sveltekit:prefetch should be conditioned on the presence of href

[frederikhors]

Is your feature request related to a problem? Please describe.
sveltekit:prefetch should be conditioned on the presence of href.

How important is this feature to you?
I have many dynamics a tag, some with, some without href.

Additional context

Yes, it is valid to use the anchor tag without a href attribute.

From https://stackoverflow.com/a/33046203.

[furudean]

How should this work? Watch the href attribute and activate prefetch behavior dynamically if a href appears?

[frederikhors]

I don't know. But now, as it is, there is an error even on mouse hover.

[Rich-Harris]

I cannot imagine why anyone would add a sveltekit:prefetch attribute to an href-less anchor, but this is easy enough to do: #1060

It may be technically valid to have an anchor without an href, but it's very rare that it's appropriate :)

[dummdidumm]

Should this be closed now that the PR is merged?