assetmapper

config/packages/asset_mapper.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $containerConfigurator->extension('framework', [
+        'asset_mapper' => [
+            'paths' => [
+                'assets/',
+            ],
+            'missing_import_mode' => 'strict',
+        ],
+    ]);
+    if ($containerConfigurator->env() === 'prod') {
+        $containerConfigurator->extension('framework', [
+            'asset_mapper' => [
+                'missing_import_mode' => 'warn',
+            ],
+        ]);
+    }
+};