Filtar Extensao upload

by Rapha Souza

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
   <!DOCTYPE html>
    <html>
    <body>
    
    <h1>Selecione o arquivo PDF:</h1>
    
    <h3>Selecione o PDF:</h3>
    <form action="/action_page.php">
      <input type="file" accept="application/pdf">
      <br><br>
      
    </form>
    
    </body>
    </html>