yui3-dom.js

var YUI = require('yui3').YUI,
    fs = require('fs');

var filename = 'foo.html';

var result = fs.readFileSync(filename, "utf8");
YUI({loadOptional: true}).use('node', function(Y) {

        Y.one('doc').set('innerHTML', result);

		var idSelector = 'div#test-id';
		var classSelector = 'div.test-case';
		var idContainer = Y.one(idSelector);
		var classContainer = Y.one(classSelector);
		if(idContainer === null){
			console.log('The ID Selector is null');
		}
		if(classContainer !== null){
			console.log('The Class Selector is not null');
		}
});