Module:Yesno

• Docs: Module:Yesno/doc (should use {{module}})
• Styles: Module:Yesno/style.css
• Templates that use this module:

All modules: book, chronology, kbd, module, photos, post, todo, wikidata link, yesno.

---

return function (val, default)
	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 val == mw.message.new( 'htmlform-yes' ):plain()
		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 val == mw.message.new( 'htmlform-no' ):plain()
		or tonumber(val) == 0
	then
		return false
	else
		return default
	end
end