Using a YUI module

app.js

YUI().use('json-stringify', function (Y) {
	'use strict';
	
	var stringified,
		parsed;
		
	stringified = Y.JSON.stringify({
		'a': 'A',
		'b': 'B'
	});
	
	// :( parse isn't available
	// need to use 'json-parse' or the 'json' rollup
	parsed = Y.JSON.parse(stringified);
});