zig Tryit Editor

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {font-family: Arial, Helvetica, sans-serif;}
/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
}
/* Modal Content */
.modal-content {
  position: relative;
  background-color: #fefefe;
  margin: auto;
  padding: 0;
  border: 1px solid #888;
  width: 80%;
  box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2),0 6px 20px 0 rgba(0,0,0,0.19);
  -webkit-animation-name: animatetop;
  -webkit-animation-duration: 0.4s;
  animation-name: animatetop;
  animation-duration: 0.4s
}
/* Add Animation */
@-webkit-keyframes animatetop {
  from {top:-300px; opacity:0} 
  to {top:0; opacity:1}
}
@keyframes animatetop {
  from {top:-300px; opacity:0}
  to {top:0; opacity:1}
}
/* The Close Button */
.close {
  color: white;
  float: right;
  font-size: 28px;
  font-weight: bold;
}
.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}
.modal-header {
  padding: 2px 16px;
  background-color: #5cb85c;
  color: white;
}
.modal-body {padding: 2px 16px;}
.modal-footer {
  padding: 2px 16px;
  background-color: #5cb85c;
  color: white;
}
</style>
</head>
<body>
<h2>Animated Modal with Header and Footer</h2>

<button id="myBtn">Open Modal</button>

<div id="myModal" class="modal">
  
  <div class="modal-content">
    <div class="modal-header">
      <span class="close">&times;</span>
      <h2>Modal Header</h2>
    </div>
    <div class="modal-body">
      <p>Some text in the Modal Body</p>
      <p>Some other text...</p>
    </div>
    <div class="modal-footer">
      <h3>Modal Footer</h3>
    </div>
  </div>
</div>
<script>
  // Get the modal
  var modal = document.getElementById("myModal");
  // Get the button that opens the modal
  var btn = document.getElementById("myBtn");
  // Get the <span> element that closes the modal
  var span = document.getElementsByClassName("close")[0];
  // When the user clicks the button, open the modal 
  btn.onclick = function () {
    modal.style.display = "block";
  }
  // When the user clicks on <span> (x), close the modal
  span.onclick = function () {
    modal.style.display = "none";
  }
  // When the user clicks anywhere outside of the modal, close it
  window.onclick = function (event) {
    if (event.target == modal) {
      modal.style.display = "none";
    }
  }
</script>
</body>

</html>