Fram Wikipǣdian

Hēr is sīo meta-metod, sēo sylð feorran ðāra dǣla tō crǣften hatnotes. Hit fæstenen sēo {{hatnote}} bysen, for brūce on hætnotum æt þǣre heafod þæs sīdan. Hit eac inclyð swīðe gelǣrede funtoða for brūce on ōðre Lua hætnot metodum.

Use fram wikiscrypst[adiht fruman]

Ssēo functions in this module cannot be used directly from #invoke, and must be used through bysen instead. Please see Bysen:Hatnote ond Bysen:Format link for motung.

Use from other Lua modules[adiht fruman]

To load this module from another Lua module, use the following code.

local mHatnote = require('Module:Hatnote')

Þū mæġ þonne brūcan þā funtoða swā gescrypsted beneoþan.

Hatnote[adiht fruman]

mHatnote._hatnote(s, options)

Formats the string s as a hatnote. This encloses s in the tags Bysen:Tag. Options are provided in the options table. Options include:

  • options.extraclasses - a string of extra classes to provide
  • options.selfref - if this is not nil or false, adds the class "selfref", used to denote self-references to Wikipedia (see Template:Selfref))

The CSS of the hatnote class is defined in Module:Hatnote/styles.css.

Example 1
mHatnote._hatnote('This is a hatnote.')

Produces: Bysen:Tag

Displays as:

Example 2
mHatnote._hatnote('This is a hatnote.', {extraclasses = 'boilerplate seealso', selfref = true})

Produces: Bysen:Tag

Displayed as:

Find namespace id[adiht fruman]

mHatnote.findNamespaceId(link, removeColon)

Finds the namespace id of the string link, which should be a valid page name, with or without the section name. This function will not work if the page name is enclosed with square brackets. When trying to parse the namespace name, colons are removed from the start of the link by default. This is helpful if users have specified colons when they are not strictly necessary. If you do not need to check for initial colons, set removeColon to false.

Bysen:Code → 0
Bysen:Code → 14
Bysen:Code → 14
Bysen:Code → 0 (the namespace is detected as ":Category", rather than "Category")

Make wikitext error[adiht fruman]

mHatnote.makeWikitextError(msg, helpLink, addTrackingCategory)

Formats the string msg as a red wikitext error message, with optional link to a help page helpLink. Normally this function also adds Category:Hatnote templates with errors (0). To suppress categorization, pass false as third parameter of the function (addTrackingCategory).


Bysen:CodeError: an error has occurred.
Bysen:CodeError: an error has occurred (help).

Examples[adiht fruman]

For an example of how this module is used in other Lua modules, see Module:Labelled list hatnote Bysen:Sandbox other

--                              Module:Hatnote                                --
--                                                                            --
-- This module produces hatnote links and links to related articles. It       --
-- implements the {{hatnote}} and {{format link}} meta-templates and includes --
-- helper functions for other Lua hatnote modules.                            --

local libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType
local checkTypeForNamedArg = libraryUtil.checkTypeForNamedArg
local mArguments -- lazily initialise [[Module:Arguments]]
local yesno -- lazily initialise [[Module:Yesno]]
local formatLink -- lazily initialise [[Module:Format link]] ._formatLink

local p = {}

-- Helper functions

local function getArgs(frame)
	-- Fetches the arguments from the parent frame. Whitespace is trimmed and
	-- blanks are removed.
	mArguments = require('Module:Arguments')
	return mArguments.getArgs(frame, {parentOnly = true})

local function removeInitialColon(s)
	-- Removes the initial colon from a string, if present.
	return s:match('^:?(.*)')

function p.defaultClasses(inline)
	-- Provides the default hatnote classes as a space-separated string; useful
	-- for hatnote-manipulation modules like [[Module:Hatnote group]].
		(inline == 1 and 'hatnote-inline' or 'hatnote') .. ' ' ..

function p.disambiguate(page, disambiguator)
	-- Formats a page title with a disambiguation parenthetical,
	-- i.e. "Example" → "Example (disambiguation)".
	checkType('disambiguate', 1, page, 'string')
	checkType('disambiguate', 2, disambiguator, 'string', true)
	disambiguator = disambiguator or 'disambiguation'
	return mw.ustring.format('%s (%s)', page, disambiguator)

function p.findNamespaceId(link, removeColon)
	-- Finds the namespace id (namespace number) of a link or a pagename. This
	-- function will not work if the link is enclosed in double brackets. Colons
	-- are trimmed from the start of the link by default. To skip colon
	-- trimming, set the removeColon parameter to false.
	checkType('findNamespaceId', 1, link, 'string')
	checkType('findNamespaceId', 2, removeColon, 'boolean', true)
	if removeColon ~= false then
		link = removeInitialColon(link)
	local namespace = link:match('^(.-):')
	if namespace then
		local nsTable =[namespace]
		if nsTable then
	return 0

function p.makeWikitextError(msg, helpLink, addTrackingCategory, title)
	-- Formats an error message to be returned to wikitext. If
	-- addTrackingCategory is not false after being returned from
	-- [[Module:Yesno]], and if we are not on a talk page, a tracking category
	-- is added.
	checkType('makeWikitextError', 1, msg, 'string')
	checkType('makeWikitextError', 2, helpLink, 'string', true)
	yesno = require('Module:Yesno')
	title = title or mw.title.getCurrentTitle()
	-- Make the help link text.
	local helpText
	if helpLink then
		helpText = ' ([[' .. helpLink .. '|help]])'
		helpText = ''
	-- Make the category text.
	local category
	if not title.isTalkPage -- Don't categorise talk pages
		and title.namespace ~= 2 -- Don't categorise userspace
		and yesno(addTrackingCategory) ~= false -- Allow opting out
		category = 'Hatnote templates with errors'
		category = mw.ustring.format(
		category = ''
	return mw.ustring.format(
		'<strong class="error">Error: %s%s.</strong>%s',

local curNs = mw.title.getCurrentTitle().namespace
p.missingTargetCat =
	--Default missing target category, exported for use in related modules
	((curNs ==  0) or (curNs == 14)) and
	'Articles with hatnote templates targeting a nonexistent page' or nil

function p.quote(title)
	--Wraps titles in quotation marks. If the title starts/ends with a quotation
	--mark, kerns that side as with {{-'}}
	local quotationMarks = {
		["'"]=true, ['"']=true, ['“']=true, ["‘"]=true, ['”']=true, ["’"]=true
	local quoteLeft, quoteRight = -- Test if start/end are quotation marks
		quotationMarks[string.sub(title,  1,  1)],
		quotationMarks[string.sub(title, -1, -1)]
	if quoteLeft or quoteRight then
		title = mw.html.create("span"):wikitext(title)
	if quoteLeft  then title:css("padding-left",  "0.15em") end
	if quoteRight then title:css("padding-right", "0.15em") end
	return '"' .. tostring(title) .. '"'

-- Hatnote
-- Produces standard hatnote text. Implements the {{hatnote}} template.

function p.hatnote(frame)
	local args = getArgs(frame)
	local s = args[1]
	if not s then
		return p.makeWikitextError(
			'no text specified',
	return p._hatnote(s, {
		extraclasses = args.extraclasses,
		selfref = args.selfref

function p._hatnote(s, options)
	checkType('_hatnote', 1, s, 'string')
	checkType('_hatnote', 2, options, 'table', true)
	options = options or {}
	local inline = options.inline
	local hatnote = mw.html.create(inline == 1 and 'span' or 'div')
	local extraclasses
	if type(options.extraclasses) == 'string' then
		extraclasses = options.extraclasses

		:attr('role', 'note')
		:addClass(options.selfref and 'selfref' or nil)

	return mw.getCurrentFrame():extensionTag{
		name = 'templatestyles', args = { src = 'Module:Hatnote/styles.css' }
	} .. tostring(hatnote)

return p