udah bisa upload xlsx

app/Http/Controllers/AddMemberController.php

@@ -50,7 +50,7 @@ class AddMemberController extends Controller
         if ($request->hasFile('list_members')) {
             try {
                 $extension = $request->file('list_members')->getClientOriginalExtension();
-                if ($extension === 'csv') {
+                if ($extension === 'xlsx' || $extension === 'csv') {
                     $path = $request->file('list_members')->getRealPath();
                     $data = Excel::load($path, function($reader) {})->get();
                     if (!empty($data)) {

public/mix-manifest.json

 {
     "/js/app.js": "/js/app.js",
     "/css/app.css": "/css/app.css"
-}
\ No newline at end of file
+}