Module:If preview/configuration explained

--We perform the actual check for whether this is a preview here sincepreprocessing is relatively expensive.local frame = mw.getCurrentFrame

local function is_preview local revision_id = frame:preprocess('') -- is usually the empty string when previewed. -- I don't know why we're checking for nil but hey, maybe someday things -- would have broken return revision_id

nil or revision_id

end

local function templatestyles return frame:extensionTagend

return