my changes

resources/assets/js/bootstrap.js

@@ -0,0 +1,27 @@
+/**
+ * We'll load the axios HTTP library which allows us to easily issue requests
+ * to our Laravel back-end. This library automatically handles sending the
+ * CSRF token as a header based on the value of the "XSRF" token cookie.
+ */
+try {
+    window.$ = window.jQuery = require('jquery');
+    // require('bootstrap-sass');
+} catch (e) {}
+
+window.axios = require('axios');
+window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
+
+/**
+ * Next we will register the CSRF Token as a common header with Axios so that
+ * all outgoing HTTP requests automatically have it attached. This is just
+ * a simple convenience so we don't have to attach every token manually.
+ */
+
+let token = document.head.querySelector('meta[name="csrf-token"]');
+
+if (token) {
+    window.axios.defaults.headers.common['X-CSRF-TOKEN'] = token.content;
+} 
+else {
+    console.error('CSRF token not found: https://laravel.com/docs/csrf#csrf-x-csrf-token');
+}