Load either Zepto or jQuery, as necessary, from a CDN with a local fallback. For use with ZURB Foundation 4.

gistfile1.txt

<script>
  document.write('<script src=//cdnjs.cloudflare.com/ajax/libs/' +
	('__proto__' in {} ?
		'zepto/1.0/zepto.min' :
		'jquery/1.9.1/jquery.min')
	+ '.js><\/script>')
</script>
<script>window.$ || document.write('<script src=/js/vendor/' +
		('__proto__' in {} ? 'zepto' : 'jquery')
	+ '.js><\/script>')
</script>