The HTML DOM style zIndex property returns and modify the stacking order of a positioned element in an HTML document.
Syntax
Following is the syntax −
Returning zIndex
object.style.zIndex
Modifying zIndex
object.style.zIndex = “value”
Values
Here, value can be −
| Value | Explanation |
|---|---|
| initial | It set this property value to its default value. |
| inherit | It inherits this property value from its parent element. |
| auto | In it the elements stack in the order based on their order in the HTML document. |
| number | It represents an integer that specifies the stack order of an element. |
Example
Let us see an example of HTML DOM style zIndex property −
<!DOCTYPE html>
<html>
<head>
<style>
body {
color: #000;
height: 100vh;
}
.box1 {
width: 100px;
height: 100px;
background: lightcoral;
position: relative;
top: 50px;
}
.box2 {
width: 100px;
height: 100px;
background: lightgreen;
position: relative;
}
.btn {
background: #db133a;
border: none;
height: 2rem;
border-radius: 2px;
width: 40%;
display: block;
color: #fff;
outline: none;
cursor: pointer;
margin: 1rem 0;
}
</style>
</head>
<body>
<h1>DOM Style zIndex Property Example</h1>
<div class='box1'></div>
<div class='box2'></div>
<button onclick="add()" class="btn">Change zIndex</button>
<script>
function add() {
document.querySelector('.box1').style.zIndex = "1";
}
</script>
</body>
</html>Output
This will produce the following output −
Click on “Change zIndex” button to change the order of red and green box −
