How TO – Modal Images

Learn how to create responsive Modal Images with CSS and JavaScript.

Modal Image

A modal is a dialog box/popup window that is displayed on top of the current page.

This example use most of the code from the previous example, Modal Boxes, only in this example, we use images.

Example

<!DOCTYPE html>
<html>
<head>
<meta name=”viewport” content=”width=device-width, initial-scale=1″>
<style>
body {font-family: Arial, Helvetica, sans-serif;}

#myImg {
border-radius: 5px;
cursor: pointer;
transition: 0.3s;
}

#myImg:hover {opacity: 0.7;}

/* 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(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (image) */
.modal-content {
margin: auto;
display: block;
width: 80%;
max-width: 700px;
}

/* Caption of Modal Image */
#caption {
margin: auto;
display: block;
width: 80%;
max-width: 700px;
text-align: center;
color: #ccc;
padding: 10px 0;
height: 150px;
}

/* Add Animation */
.modal-content, #caption {
-webkit-animation-name: zoom;
-webkit-animation-duration: 0.6s;
animation-name: zoom;
animation-duration: 0.6s;
}

@-webkit-keyframes zoom {
from {-webkit-transform:scale(0)}
to {-webkit-transform:scale(1)}
}

@keyframes zoom {
from {transform:scale(0)}
to {transform:scale(1)}
}

/* The Close Button */
.close {
position: absolute;
top: 15px;
right: 35px;
color: #f1f1f1;
font-size: 40px;
font-weight: bold;
transition: 0.3s;
}

.close:hover,
.close:focus {
color: #bbb;
text-decoration: none;
cursor: pointer;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
.modal-content {
width: 100%;
}
}
</style>
</head>
<body>

<h2>Image Modal</h2>
<p>In this example, we use CSS to create a modal (dialog box) that is hidden by default.</p>
<p>We use JavaScript to trigger the modal and to display the current image inside the modal when it is clicked on. Also note that we use the value from the image’s “alt” attribute as an image caption text inside the modal.</p>

<!– The Modal –>
<div id=”myModal”>
<span>×</span>
<img id=”img01″>
<div id=”caption”></div>
</div>

// Get the image and insert it inside the modal – use its “alt” text as a caption
var img = document.getElementById(“myImg”);
var modalImg = document.getElementById(“img01”);
var captionText = document.getElementById(“caption”);
img.onclick = function(){
modal.style.display = “block”;
modalImg.src = this.src;
captionText.innerHTML = this.alt;
}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName(“close”)[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = “none”;
}
</script>

</body>
</html>

Step 1) Add HTML:

Example

<!– Trigger the Modal –>
<img id=”myImg” src=”img_snow.jpg” alt=”Snow” style=”width:100%;max-width:300px”>

<!– The Modal –>
<div id=”myModal” class=”modal”>

<!– The Close Button –>
<span class=”close”>×</span>

<!– Modal Content (The Image) –>
<img class=”modal-content” id=”img01″>

<!– Modal Caption (Image Text) –>
<div id=”caption”></div>
</div>

Step 2) Add CSS:

Example

/* Style the Image Used to Trigger the Modal */
#myImg {
border-radius: 5px;
cursor: pointer;
transition: 0.3s;
}

#myImg:hover {opacity: 0.7;}

/* 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(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (Image) */
.modal-content {
margin: auto;
display: block;
width: 80%;
max-width: 700px;
}

/* Caption of Modal Image (Image Text) – Same Width as the Image */
#caption {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: #ccc;
  padding: 10px 0;
height: 150px;
}

/* Add Animation – Zoom in the Modal */
.modal-content, #caption {
animation-name: zoom;
animation-duration: 0.6s;
}

@keyframes zoom {
from {transform:scale(0)}
to {transform:scale(1)}
}

/* The Close Button */
.close {
  position: absolute;
top: 15px;
right: 35px;
color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}

.close:hover,
.close:focus {
color: #bbb;
text-decoration: none;
cursor: pointer;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
  .modal-content {
    width: 100%;
  }
}

Step 3) Add JavaScript: