Module:Category handler/data/doc

This is the documentation page for Module:Category handler/data

This Lua module is used in system messages, and on approximately 4,700,000 pages, or roughly 143031% 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.