multiple extensions

Author: Alexey Litvinov

lib/index.js

@@ -121,11 +121,23 @@ module.exports = function setupHook({
     return tokens;
   };
 
+  const exts = toArray(extensions);
   const isException = buildExceptionChecker(ignore);
 
-  attachHook(filename => fetch(filename, filename), '.css', isException);
+  // @todo add possibility to specify particular config for each extension
+  exts.forEach(extension => attachHook(filename => fetch(filename, filename), '.css', isException));
 };
 
+/**
+ * @param  {*} option
+ * @return {array}
+ */
+function toArray(option) {
+  return Array.isArray(option)
+    ? option
+    : [option];
+}
+
 /**
  * @param  {function|regex|string} ignore glob, regex or function
  * @return {function}