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diff --git a/school/node_modules/cssom/lib/clone.js b/school/node_modules/cssom/lib/clone.js
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+++ b/school/node_modules/cssom/lib/clone.js
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+//.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