Module:If preview/configuration
 | This Lua module is used in system messages, and on approximately 321,000 pages, or roughly 1% of all pages. Changes to it can cause immediate changes to the Wikipedia user interface. To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Please discuss changes on the talk page before implementing them. |
This module does the actual work for determining if the page is in preview mode. It is a separate module so mw.loadData can only run it once per page, rather than once per use.
--[[
We perform the actual check for whether this is a preview here since
preprocessing is relatively expensive.
]]
local function is_preview()
local revision_id = mw.getCurrentFrame():preprocess('{{REVISIONID}}')
-- {{REVISIONID}} 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
return {
preview = is_preview(),
templatestyles = 'Module:Is preview/styles.css',
i18n = {
warning_infrastructure = '%s<div class="preview-warning"><strong>Preview warning:</strong> %s</div>',
warning_no_text = 'The template has no warning text. Please add a warning.'
}
}