To set the stack order, use the zIndex property. You can try to run the following code to implement zIndex property in JavaScript −
Example
<!DOCTYPE html>
<html>
<head>
<style>
#myID {
position: absolute;
left: 20px;
top: 20px;
z-index: -1
}
</style>
</head>
<body>
<img id = "myID"
src="https://www.tutorialspoint.com/videotutorials/images/tutor_connect_home.jpg"
width = "150" height = "150">
<button type="button" onclick="myFunction()">Set Stack Order</button>
<p>Z-index is -1</p>
<script>
function myFunction() {
document.getElementById("myID").style.zIndex = "1";
}
</script>
</body>
</html>