selectors.counter.js

var
  styleSheets = document.styleSheets,
	totalStyleSheets = styleSheets.length;

for (var j = 0; j < totalStyleSheets; j++){
	var
		styleSheet = styleSheets[j],
		rules = styleSheet.cssRules,
		totalRulesInStylesheet = rules.length,
		totalSelectorsInStylesheet = 0;

	for (var i = 0; i < totalRulesInStylesheet; i++) {
		if (rules[i].selectorText){
			totalSelectorsInStylesheet += rules[i].selectorText.split(',').length;
			console.log([rules[i].selectorText.split(',').length, rules[i].selectorText]);
		}
	}
	console.log("Stylesheet: "+styleSheet.href);
	console.log("Total rules: "+totalRulesInStylesheet);
	console.log("Total selectors: "+totalSelectorsInStylesheet);
	console.log("===========================");
}