Module:If preview/configuration/doc
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 | This is a documentation subpage for Module:If preview/configuration. It may contain usage information, categories and other content that is not part of the original module page. |
| Error creating thumbnail: File missing | This Lua module is used in system messages, and on approximately 999,000 pages, or roughly 1% of all pages. Changes to it can cause immediate changes to the MyWiki 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.