mod_xhtmlim: Turn unknown elements into <span> In HTML, you're supposed to replace unknown tags with their content. The :maptags API can't replace tags with text, but replacing with <span> should close enough.

module:set_global();

local log = _G.log;

module:add_timer(60-os.date("%S"), function (now)
	log("info", "-- MARK --");
	return 90 - ((now + 30) % 60);
end);