These were the steps I took:
Initially, I identified that the background image specified in your css was invalid, so I substituted it with a regular background color (transparent black) which you can adjust as needed.
Next, I modified allBoxes.on('hover mousemove' to allBoxes.on('mouseover', and changed $('body').mousemove to allBoxes.on('mouseout'.
Subsequently, I eliminated the $busy flag tracking.
Lastly, I updated var currentBox = $('.active'); to
var currentBox = $(event.target);
.
var app = function () {
var self = this;
var allBoxes = $('.box');
var shadow = $('#shadow');
var busy = false;
self.init = function () {
self.events();
};
self.getBoxLeftPosition = function(id)
{
var left = 100;
if (id == 'box2')
{
left = 300;
} else if (id == 'box3')
{
left = 500;
} else if (id == 'box4')
{
left = 700;
}
return left;
};
self.events = function () {
allBoxes.on('mouseover', function(event) {
event.stopPropagation();
var currentBox = $(this);
if (currentBox.hasClass('inactive') && !busy)
{
//busy = true;
currentBox.removeClass('inactive').addClass('active').animate({
left: '-=30',
width: 260
}, 400, function () {
//busy = false;
});
shadow.fadeIn(400);
}
});
allBoxes.on('mouseout', function(event) {
var currentBox = $(event.target);
var leftValue = self.getBoxLeftPosition(currentBox.attr('id'));
if (currentBox.length > 0)
{
currentBox.stop();
currentBox.animate({
left: leftValue,
width: 200
}, 300, 'swing', function () {
currentBox.removeClass('active').addClass('inactive');
}, 300);
shadow.fadeOut(300);
}
});
};
return self;
};
var main = new app();
main.init();
html, body {
margin: 0;
}
.box {
position: absolute;
top: 120px;
width: 200px;
height: 420px;
}
.box div {
text-align: center;
color: white;
position: absolute;
top: 200px;
left: 0;
right: 0;
font-size: 25px;
font-weight: bold;
}
#box1 {
left: 100px;
background: pink;
}
#box2 {
left: 300px;
background: skyblue;
}
#box3 {
left: 500px;
background: orange;
}
#box4 {
left: 700px;
background: lightgreen;
}
#shadow {
display: none;
position: absolute;
left: 0;
top: 0;
width: 1000px;
height: 600px;
/*background: url('https://lh6.googleusercontent.com/Vz0GTzpQVaxmlIvvGgg64CSxcYBbHzu7gMQERduJ4qjU5HAg8KfisFFQvIqvKL5Vn7LIy6HZ=w1920-h916');*/
background-color: rgba(0,0,0,0.5); /* transparent black */
z-index: 10;
}
.inactive {
z-index: 5;
}
.active {
z-index: 20;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="box1" class="box inactive">
<div id="copy1">Copy 1</div>
</div>
<div id="box2" class="box inactive">
<div id="copy2">Copy 2</div>
</div>
<div id="box3" class="box inactive">
<div id="copy3">Copy 3</div>
</div>
<div id="box4" class="box inactive">
<div id="copy4">Copy 4</div>
</div>
<div id="shadow"></div>