use:enhance upgrade to attach enhance

[jdgamble555]

Describe the problem

Since use is probably going to go away eventually, would be nice to see a switch to attachments.

Describe the proposed solution

I would imagine it as simple as:

<div {@attach enhance}>...</div>

Alternatives considered

This would work until the infamous RPC files are implemented.

Importance

nice to have

Additional Information

Seems like a natural transition.