Address feedback

extensions/css-language-features/server/src/utils/languageFacts.ts

@@ -0,0 +1,23 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { CSSData } from 'vscode-css-languageservice';
+
+export function parseCSSData(source: string): CSSData {
+	let rawData: any;
+
+	try {
+		rawData = JSON.parse(source);
+	} catch (err) {
+		return {};
+	}
+
+	return {
+		properties: rawData.properties || [],
+		atDirectives: rawData.atdirectives || [],
+		pseudoClasses: rawData.pseudoclasses || [],
+		pseudoElements: rawData.pseudoelements || []
+	};
+}