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.
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
local is_preview = revision_id == nil or revision_id == ''
return {
preview = is_preview
}