Editing Module:Gaps/sandbox

local p = {}

local getArgs

function p.main(frame)
	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	local args = getArgs(frame, {wrappers = 'Template:Gaps'})

	local ret_span = mw.html.create('span')
		:css('white-space','nowrap')
		:css('font-size',args.size)

	if args.lhs then
		ret_span:wikitext(args.lhs .. ' = ')
	end

	for k,v in ipairs(args) do
		if k == 1 then
			ret_span:wikitext(v)
		else
			ret_span:tag('span')
				:css('margin-left','0.2em')
				:wikitext(v)
		end
	end

	if args.e then
		ret_span
			:tag('span')
				:css('margin-left','0.27em')
				:css('margin-right','0.27em')
				:wikitext('×')
			:done()
			:wikitext(args.base or '10')
			:tag('span')
				:css('display','none')
				:wikitext('^')
			:done()
			:tag('sup')
				-- the double parentheses here are not redundant.
				-- they keep the second return value from being passed
				:wikitext((mw.ustring.gsub(args.e,'-','−')))
			:done()
	end

	if args.u then
		ret_span:wikitext('&nbsp;' .. args.u)
	end

	return ret_span
end

return p