newbie exercise with PhantomJS and web scraping

get-github-user-info.js

#! /bin/env phantomjs
/*
	Teaching myself:
		- [hopefully] clean/readable JavaScript coding
		- PhantomJS to render a page from command-line
		- using CSS selector to scrape an element value from DOM
*/

var SYS= require('system');
if(SYS.args.length <2) {
	console.log('usage: '+ SYS.args[0] +' <Github Username> [CSS Selector]');
	phantom.exit(1);
}
var user= SYS.args[1],
    query= SYS.args.length <3
	? 'h1.vcard-names > span.vcard-fullname' // Full Name
//	? 'ul.vcard-details > li.vcard-detail > a.email.js-obfuscate-email' // Email Address
	: SYS.args[2],
    WP= require('webpage').create();

//======================================================================

//----------------------------------------------------------------------
WP.onLoadFinished= function(status) {
	if(status !=='success') {
		console.log('ERROR: '+ status);
		phantom.exit(1);
	}

	var vcard= 'html:root > body.logged_out > div.wrapper > div.site.clearfix > div#site-container\
		> div.container > div.columns.profilecols.js-username > div.column.one-fourth.vcard',
	    value= WP.evaluate(getValue, selector= query ? vcard +' > '+ query : vcard);

	function getValue(selector) {
		ele= document.querySelector(selector)
		if(ele.hasOwnProperty('innerHTML'))
			return ele.innerHTML;
		else	return '';
	}

	console.log(value);
	phantom.exit();
}

//======================================================================

WP.open('https://github.com/'+ user);