Copy text and show a message in the toast

<style>
        #snackbar {
    visibility: hidden; /* Hidden by default. Visible on click */
    min-width: 250px; /* Set a default minimum width */
    margin-left: -125px; /* Divide value of min-width by 2 */
    background-color: #333; /* Black background color */
    color: #fff; /* White text color */
    text-align: center; /* Centered text */
    border-radius: 2px; /* Rounded borders */
    padding: 16px; /* Padding */
    position: fixed; /* Sit on top of the screen */
    z-index: 1; /* Add a z-index if needed */
    left: 50%; /* Center the snackbar */
    top: 30px; /* 30px from the bottom */
}

/* Show the snackbar when clicking on a button (class added with JavaScript) */
#snackbar.show {
    visibility: visible; /* Show the snackbar */

/* Add animation: Take 0.5 seconds to fade in and out the snackbar. 
However, delay the fade out process for 2.5 seconds */
    -webkit-animation: fadein 0.5s, fadeout 0.5s 2.5s;
    animation: fadein 0.5s, fadeout 0.5s 2.5s;
}

/* Animations to fade the snackbar in and out */
@-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>
<script>
     function copyfunc(element) {
  var range, selection;

  if (document.body.createTextRange) {
    range = document.body.createTextRange();
    range.moveToElementText(element);
    range.select();
  } else if (window.getSelection) {
    selection = window.getSelection();        
    range = document.createRange();
    range.selectNodeContents(element);
    selection.removeAllRanges();
    selection.addRange(range);
  }
  
  try {
    document.execCommand('copy');
    var x = document.getElementById("snackbar");
    x.className = "show";
    setTimeout(function(){ x.className = x.className.replace("show", ""); }, 3000);
  }
  catch (err) {
    alert('unable to copy text');
  }
}
   
    </script>