$ ist nicht definiert
We must delete "defer attribute"
->app.blade.php
//this is wrong
<script src="{{ asset('js/app.js') }}" defer></script>
//this is correct
<script src="{{ asset('js/app.js') }}" ></script>
->resources>js>app.js
window.$ = require("jquery")
window.bootstrap = require("bootstrap");
WinMaw