Module:Yesno

Module:Yesno/doc

Function allowing for consistent treatment of boolean-like wikitext input.

From Wikipedia, see:
https://en.wikipedia.org/wiki/Module:Yesno
https://en.wikipedia.org/w/index.php?title=Module:Documentation

This module is a dependency of Module:Documentation, see the documentation there.

---

The above doc is transcluded from Module:Yesno/doc. (edit | history)
Add categories to the /doc subpage, not here. Subpages of this template.

---

return function (val, default)
	-- If your wiki uses non-ascii characters for any of "yes", "no", etc., you
	-- should replace "val:lower()" with "mw.ustring.lower(val)" in the
	-- following line.
	val = type(val) == 'string' and val:lower() or val
	if val == nil then
		return nil
	elseif val == true 
		or val == 'yes'
		or val == 'y'
		or val == 'true'
		or val == 't'
		or val == 'on'
		or tonumber(val) == 1
	then
		return true
	elseif val == false
		or val == 'no'
		or val == 'n'
		or val == 'false'
		or val == 'f'
		or val == 'off'
		or tonumber(val) == 0
	then
		return false
	else
		return default
	end
end