title: How to add Bootstrap, jQuery, and popper.js to Laravel 8 project using laravel-mix?
body: <p>As I understand, the following commands should install Bootstrap, jQuery, and popper.js:</p>
  <pre><code>composer require laravel/ui
  php artisan ui bootstrap
  npm install &amp;&amp; npm run dev
  </code></pre>
  <p>After running these commands I can now use Bootstrap class names, but I cannot use jQuery. When I try to add some jQuery code I get the following error: <code>Uncaught ReferenceError: $ is not defined</code></p>
  <p>I have added <code>&lt;script src=&quot;{{ asset('js/app.js') }}&quot;&gt;&lt;/script&gt;</code> and <code>&lt;link href=&quot;{{ asset('css/app.css') }}&quot; rel=&quot;stylesheet&quot;&gt;</code> to the head of the document.</p>
  <p>Am I missing something here?</p>
  <p>Example code:</p>
  <pre><code>&lt;!doctype html&gt;
  &lt;html class=&quot;no-js&quot; lang=&quot;da&quot;&gt;
  
  &lt;head&gt;
      &lt;script src=&quot;{{ asset('js/app.js') }}&quot;&gt;&lt;/script&gt;
      &lt;link href=&quot;{{ asset('css/app.css') }}&quot; rel=&quot;stylesheet&quot;&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;script&gt;
      $(document).ready(function () {
          alert(0);
      });
  &lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>