So the challenge has 4 parts:
Make the image appear in thumbnail size on the page before it appears in the modal.
Change the opacity of the image on hover, so that users know if they click on it something may happen.
When the image is clicked, take information from the image tag and pass it to the modal window.
Make the image take up the whole modal window when launched.
Below is how to do it. I've highlighted the code in red.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Image to modal</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
<style>
img
{
width:6em;
}
img:hover
{
opacity: 0.4;
filter: alpha(opacity=40);
}
#exampleModal > div.modal-dialog > div > div.modal-body > img
{
width:100%;
}
</style>
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<img src="mick.png" alt="A picture of Mick" data-toggle="modal" data-target="#exampleModal"><br />
<img src="rojin.jpg" alt="A picture of Rojin" data-toggle="modal" data-target="#exampleModal">
<!-- Now the modal window -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title"></h4>
</div>
<div class="modal-body"></div>
<div class="modal-footer"></div>
</div><!-- /.modal-content -->
</div><!-- /.modal-dialog -->
</div><!-- /.modal -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<script>
(function()
{
$('#exampleModal').on('show.bs.modal', function (event)
{
var img = $(event.relatedTarget);
var alt = img.attr('alt');
var src = img.attr('src');
var modal = $(this);
modal.find('.modal-title').text(alt);
modal.find('.modal-body').html('<img src="'+src+'" />');
});
})();
</script>
</body>
</html>
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