browser.js
function(cssText, attributes, extraOptions) {
        extraOptions = extraOptions || {};

        var style = document.createElement('style');
        style.type = 'text/css';

        for (var key in attributes) {
            if ( ! attributes.hasOwnProperty(key)) {
                continue;
            }
            var value = attributes[key];
            style.setAttribute('data-' + key, value);
        }

        if (style.sheet) { // for jsdom and IE9+
            style.innerHTML = cssText;
            style.sheet.cssText = cssText;
            insertStyleElement(style, { insertAt: extraOptions.insertAt });
        } else if (style.styleSheet) { // for IE8 and below
            insertStyleElement(style, { insertAt: extraOptions.insertAt });
            style.styleSheet.cssText = cssText;
        } else { // for Chrome, Firefox, and Safari
            style.appendChild(document.createTextNode(cssText));
            insertStyleElement(style, { insertAt: extraOptions.insertAt });
        }
    }
function(cssText, attributes, extraOptions) {
        extraOptions = extraOptions || {};

        var style = document.createElement('style');
        style.type = 'text/css';

        for (var key in attributes) {
            if ( ! attributes.hasOwnProperty(key)) {
                continue;
            }
            var value = attributes[key];
            style.setAttribute('data-' + key, value);
        }

        if (style.sheet) { // for jsdom and IE9+
            style.innerHTML = cssText;
            style.sheet.cssText = cssText;
            insertStyleElement(style, { insertAt: extraOptions.insertAt });
        } else if (style.styleSheet) { // for IE8 and below
            insertStyleElement(style, { insertAt: extraOptions.insertAt });
            style.styleSheet.cssText = cssText;
        } else { // for Chrome, Firefox, and Safari
            style.appendChild(document.createTextNode(cssText));
            insertStyleElement(style, { insertAt: extraOptions.insertAt });
        }
    }
Create a <style> tag with optional data attributes