Count total rules and selectors for each CSS file in a web page

count css rules

function showCSSCountInfo(options) {
  var styleSheets = document.styleSheets,
          totalStyleSheets = styleSheets.length;
          
  options = options || {};
  alert_exceeded = options.alert_exceeded || true;
  max = options.max || 4096;

  for (var j = 0; j < totalStyleSheets; j++) {
      var styleSheet = styleSheets[j],
              rules = styleSheet.cssRules,
              totalSelectorsInStylesheet = 0;
  
      var totalRulesInStylesheet = rules ? rules.length : 0;
  
      for (var i = 0; i < totalRulesInStylesheet; i++) {
          if (rules[i].selectorText) {
              try {
                  totalSelectorsInStylesheet += rules[i].selectorText.split(',').length;
              }
              catch (err) {
                  console.log(err);
              }
          }
      }
      
      console.log("Stylesheet: " + styleSheet.href);
      console.log("Total rules: " + totalRulesInStylesheet);
      console.log("Total selectors: " + totalSelectorsInStylesheet);
      
      if (alert_exceeded && totalSelectorsInStylesheet > max) {
        alert("Stylesheet: " + styleSheet.href + "\n" + "Total rules: " + totalRulesInStylesheet + "\n" + "Total selectors: " + totalSelectorsInStylesheet)
      }
  }
}