Hiệu ứng hover Modal Images trong bootstrap

Một cửa sổ bật lên hộp thoại sẽ được hiển thị trên đầu trang của trang hiện tại.

Step 1) Thêm HTML:

<img id="zoom_01" class="zoom-show" src="<?php the_post_thumbnail_url( 'medium' ); ?>">
<div id="myModal2" class="modal2" style="display: none;">
<span class="closeimg" onclick="document.getElementById('myModal2').style.display='none'">×</span>
<img class="modal-content2" id="img02" src="<?php the_post_thumbnail_url(); ?>">
<div id="caption"><?php $post->post_title; ?></div>
</div>

Step 2) Thêm CSS:

#myImg {
    width: 30%;
    height: auto;
    border-radius: 5px;
    cursor: pointer;
    transition: .3s;
}
#myImg:hover {
    opacity: 0.7;
}
/* The Modal (background) */
.modal2 {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 4; /* 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 */
.modal-content2 {
    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-content2, #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 */
.closeimg {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}
.closeimg:hover,.closeimg:focus {
   color: #bbb;
   text-decoration: none;
   cursor: pointer;
}

---

Step 3) Thêm JavaScript:

var modal = document.getElementById('myModal2');

var img = document.getElementById('zoom_01');
// var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");
$( "#zoom_01" ).click(function() {
 modal.style.display = "block";
// modalImg.src = this.src;
captionText.innerHTML = this.alt;
});
$( ".closeimg" ).click(function() {
modal.style.display = "none";
});