<script SRC="https://code.jquery.com/jquery-3.3.1.min.js" crossorigin="anonymous" & gt; </script>
<script SRC="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" crossorigin="anonymous" & gt; </script>
<script SRC="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" crossorigin="anonymous" & gt; </script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" crossorigin="anonymous" & gt;

These are introduced, and the local file! For the great god for help