Module:Ns has subpages/doc

This Lua module is used in system messages, and on approximately 3,040,000 pages, or roughly 5% 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 can only be edited by administrators because it is transcluded onto one or more cascade-protected pages.

This module finds whether a given namespace can have subpages.

Usage

From wikitext

From wikitext this module must be used via the {{ns has subpages}} template. Please see the template page for documentation.

From Lua

Usually Lua modules should use mw.site.namespaces[namespace].hasSubpages rather than this module. But if you have a good reason, it can be accessed like this:

Load the module:

local mNsHasSubpages = require('Module:Ns has subpages')

The subpage information can be found with the ._main function:

mNsHasSubpages._main(ns, frame)

ns is the namespace name, number, or a page name. It defaults to the current namespace.
frame is a frame object with which we can call frame:callParserFunction if necessary. This is optional, and intended for internal use.