source: frontend/node_modules/cssom/lib/clone.js

//.CommonJS
var CSSOM = {
        CSSStyleSheet: require("./CSSStyleSheet").CSSStyleSheet,
        CSSStyleRule: require("./CSSStyleRule").CSSStyleRule,
        CSSMediaRule: require("./CSSMediaRule").CSSMediaRule,
        CSSSupportsRule: require("./CSSSupportsRule").CSSSupportsRule,
        CSSStyleDeclaration: require("./CSSStyleDeclaration").CSSStyleDeclaration,
        CSSKeyframeRule: require('./CSSKeyframeRule').CSSKeyframeRule,
        CSSKeyframesRule: require('./CSSKeyframesRule').CSSKeyframesRule
};
///CommonJS


/**
 * Produces a deep copy of stylesheet — the instance variables of stylesheet are copied recursively.
 * @param {CSSStyleSheet|CSSOM.CSSStyleSheet} stylesheet
 * @nosideeffects
 * @return {CSSOM.CSSStyleSheet}
 */
CSSOM.clone = function clone(stylesheet) {

        var cloned = new CSSOM.CSSStyleSheet();

        var rules = stylesheet.cssRules;
        if (!rules) {
                return cloned;
        }

        for (var i = 0, rulesLength = rules.length; i < rulesLength; i++) {
                var rule = rules[i];
                var ruleClone = cloned.cssRules[i] = new rule.constructor();

                var style = rule.style;
                if (style) {
                        var styleClone = ruleClone.style = new CSSOM.CSSStyleDeclaration();
                        for (var j = 0, styleLength = style.length; j < styleLength; j++) {
                                var name = styleClone[j] = style[j];
                                styleClone[name] = style[name];
                                styleClone._importants[name] = style.getPropertyPriority(name);
                        }
                        styleClone.length = style.length;
                }

                if (rule.hasOwnProperty('keyText')) {
                        ruleClone.keyText = rule.keyText;
                }

                if (rule.hasOwnProperty('selectorText')) {
                        ruleClone.selectorText = rule.selectorText;
                }

                if (rule.hasOwnProperty('mediaText')) {
                        ruleClone.mediaText = rule.mediaText;
                }

                if (rule.hasOwnProperty('conditionText')) {
                        ruleClone.conditionText = rule.conditionText;
                }

                if (rule.hasOwnProperty('cssRules')) {
                        ruleClone.cssRules = clone(rule).cssRules;
                }
        }

        return cloned;

};

//.CommonJS
exports.clone = CSSOM.clone;
///CommonJS