For sandboxing imported stuff, e.g for federation?

[Mat]

[Warning: I'm about to use big words that I don't understand. Chances are this might result in nonsense. But the intention is good ;-) ]

Thus;

As safety measure to allow raw code and markup, rather than parsed static content, to transfer in the postmessaging (as in twederation), maybe a tiddly-wikified version of iframify could be used to sandbox?

Yeah. Now going back to A Cat in a Hat.

<:-)