I recently added a new tag <active code={...}/>, where the code is a
[transaction xbody], run whenever this HTML is added to the DOM, where
the result of the transaction determines what appears at this point in
the page.
I discovered that I needed to block the operations [recv], [rpc], and
[sleep] in such positions, since otherwise we might need to delay
initial rendering of the page indefinitely for network communication or
sleeping, or implement a nasty (IMO) hack of showing some default
content until then.
Edward has suggested that <active> could work with a [transaction unit]
instead of a [transaction xbody], not directly affecting page output,
but with the option to set some [source]s to affect reactive rendering
elsewhere.
Does anyone else have thoughts on the right interface for this feature?
I think it fills an important role, increasing modularity by allowing
packaging of HTML fragments with the side effects needed to initialize them.
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