The DOM style opacity property returns and modify the value of opacity CSS property of an element in an HTML document.
Syntax
Following is the syntax −
1. Returning opacity
object.style.opacity
Modifying opacity
object.style.opacity = “value”
Example
Let us see an example of style opacity property −
<!DOCTYPE html>
<html>
<head>
<style>
body {
color: #000;
background: lightblue;
height: 100vh;
}
p {
background: #1f13db;
height: 50px;
width: 100%;
}
.btn {
background: #db133a;
border: none;
height: 2rem;
border-radius: 2px;
width: 40%;
display: block;
color: #fff;
outline: none;
cursor: pointer;
}
</style>
</head>
<body>
<h1>DOM Style opacity Property Example</h1>
<p></p>
<button onclick="add()" class="btn">Add opacity</button>
<script>
function add() {
document.querySelector('p').style.opacity = "0.2";
}
</script>
</body>
</html>Output
This will produce the following output −
Click on “Add opacity” button to add opacity property −
