<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
      #snackbar {
        visibility: hidden;
        min-width: 250px;
        margin-left: -125px;
        background-color: #333;
        color: #fff;
        text-align: center;
        border-radius: 2px;
        padding: 16px;
        position: fixed;
        z-index: 1;
        left: 50%;
        top: 30px;
        font-size: 17px;
      }

      #snackbar.show {
        visibility: visible;
        -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
        animation: fadein 0.5s, fadeout 0.5s 2.5s;
      }

      @-webkit-keyframes fadein {
        from {top: 0; opacity: 0;}
        to {top: 30px; opacity: 1;}
      }

      @keyframes fadein {
        from {top: 0; opacity: 0;}
        to {top: 30px; opacity: 1;}
      }

      @-webkit-keyframes fadeout {
        from {top: 30px; opacity: 1;}
        to {top: 0; opacity: 0;}
      }

      @keyframes fadeout {
        from {top: 30px; opacity: 1;}
        to {top: 0; opacity: 0;}
      }
    </style>
  </head>
  <body>

    <h2>Snackbar / Toast</h2>
    <p>Snackbars are often used as a tooltips/popups to show a message at the bottom of the screen.</p>
    <p>Click on the button to show the snackbar. It will disappear after 3 seconds.</p>

    <button onclick="myFunction()">Show Snackbar</button>

    <div id="snackbar">Some text some message..</div>

    <script>
      function myFunction() {
        var x = document.getElementById("snackbar");
        x.className = "show";
        setTimeout(function(){ x.className = x.className.replace("show", ""); }, 3000);
      }
    </script>

  </body>
</html>