replaced this. with modules.

lib/single-file/single-file-browser.js

@@ -54,15 +54,15 @@ this.SingleFileBrowser = this.SingleFileBrowser || (() => {
 		imagesAltMinifier: this.imagesAltMinifier,
 		serializer: this.serializer
 	};
-	this.fontsAltMinifier.cssTree = cssTree;
-	this.fontsMinifier.cssTree = cssTree;
-	this.fontsMinifier.fontPropertyParser = this.fontPropertyParser;
-	this.fontsMinifier.docHelper = docHelper;
-	this.matchedRules.cssTree = cssTree;
-	this.mediasMinifier.cssTree = cssTree;
-	this.mediasMinifier.mediaQueryParser = this.mediaQueryParser;
-	this.cssRulesMinifier.cssTree = cssTree;
-	this.imagesAltMinifier.srcsetParser = this.srcsetParser;
+	modules.fontsAltMinifier.cssTree = cssTree;
+	modules.fontsMinifier.cssTree = cssTree;
+	modules.fontsMinifier.fontPropertyParser = this.fontPropertyParser;
+	modules.fontsMinifier.docHelper = docHelper;
+	modules.matchedRules.cssTree = cssTree;
+	modules.mediasMinifier.cssTree = cssTree;
+	modules.mediasMinifier.mediaQueryParser = this.mediaQueryParser;
+	modules.cssRulesMinifier.cssTree = cssTree;
+	modules.imagesAltMinifier.srcsetParser = this.srcsetParser;
 	const domUtil = {
 		getContent, parseDocContent, parseSVGContent, isValidFontUrl, getContentSize, digestText
 	};