Fix #167

index.js

@@ -342,12 +342,14 @@ function getImportsToResolve(originalImport) {
             return [originalImport];
         }
     }
-    if (ext) {
-        if (ext === '.scss' || ext === '.sass') {
-            add(basename);
-        }/* else {
-            Leave unknown extensions (like .css) untouched
-        }*/
+
+    // We can't just check for ext being defined because ext can also be something like '.datepicker'
+    // when the true extension is omitted and the filename contains a dot.
+    // @see https://github.com/jtangelder/sass-loader/issues/167
+    if (ext === '.css') {
+        // do not import css files
+    } else if (ext === '.scss' || ext === '.sass') {
+        add(basename);
     } else {
         if (!startsWithUnderscore) {
             // Prefer modules starting with '_' first