w3.css popup code example

Example 1: popup box in html

<!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 {
  background-color: #fefefe;
  margin: auto;
  padding: 20px;
  border: 1px solid #888;
  width: 80%;
}

/* The Close Button */
.close {
  color: #aaaaaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}
</style>
</head>
<body>

<h2>Modal Example</h2>

<!-- Trigger/Open The Modal -->
<button id="myBtn">Open Modal</button>

<!-- The Modal -->
<div id="myModal" class="modal">

  <!-- Modal content -->
  <div class="modal-content">
    <span class="close">&times;</span>
    <p>Some text in the Modal..</p>
  </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>

Example 2: popup CSS code

@import "https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css";

body {
  background:#ddd;
  font-family:"Raleway";
}
.center {
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
}
.popup {
  width:350px;
  height:280px;
  padding:30px 20px;
  background:#f5f5f5;
  border-radius:10px;
  box-sizing:border-box;
  z-index:2;
  text-align:center;
  opacity:0;
  top:-200%;
  transform:translate(-50%,-50%) scale(0.5);
  transition: opacity 300ms ease-in-out,
              top 1000ms ease-in-out,
              transform 1000ms ease-in-out;
}
.popup.active {
  opacity:1;
  top:50%;
  transform:translate(-50%,-50%) scale(1);
  transition: transform 300ms cubic-bezier(0.18,0.89,0.43,1.19);
}
.popup .icon {
  margin:5px 0px;
  width:50px;
  height:50px;
  border:2px solid #34f234;
  text-align:center;
  display:inline-block;
  border-radius:50%;
  line-height:60px;
}
.popup .icon i.fa {
  font-size:30px;
  color:#34f234;
} 
.popup .title {
  margin:5px 0px;
  font-size:30px;
  font-weight:600;
}
.popup .description {
  color:#222;
  font-size:15px;
  padding:5px;
}
.popup .dismiss-btn {
  margin-top:15px;
}
.popup .dismiss-btn button {
  padding:10px 20px;
  background:#111;
  color:#f5f5f5;
  border:2px solid #111;
  font-size:16px;
  font-weight:600;
  outline:none;
  border-radius:10px;
  cursor:pointer;
  transition: all 300ms ease-in-out;
}
.popup .dismiss-btn button:hover {
  color:#111;
  background:#f5f5f5;
}
.popup > div {
  position:relative;
  top:10px;
  opacity:0;
}
.popup.active > div {
  top:0px;
  opacity:1;
}
.popup.active .icon {
  transition: all 300ms ease-in-out 250ms;
}
.popup.active .title {
  transition: all 300ms ease-in-out 300ms;
}
.popup.active .description {
  transition: all 300ms ease-in-out 350ms;
}
.popup.active .dismiss-btn {
  transition: all 300ms ease-in-out 400ms;
}

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Html Example