In this article, we will implement a frosted glass effect using the bootstrap 4 card class. The below image is the final output that you will get as the final result of this article.

Approach:
1. Styling the body:
Let's first set the background for your webpage. Write the below code under your head tag inside your <style> tag. If you have already set your background property (which you would have) then skip to the next section. If not, here you go.
body {
background-image: url('background.jpg');
background-repeat: no-repeat;
background-size: 100%;
background-attachment: fixed;
}
You can read about the above properties here
2. Frost glass card:
Under the style tag, use the following code,
.card {
box-shadow: 0 0 5px 0 ;
background: inherit;
backdrop-filter: blur(10px);
<!--margin: 100px; according to your need-->
}
So what do we have here,
- box-shadow: This property is used to give a shadow-like effect to the frames of an element.
- background: Use this to make the element transparent and have the same background as your webpage (in the body class its necessary to have "background-attachment: fixed,")
- backdrop-filter: Use this to apply effects to the area behind an element. (Read this as well) Basically, this is the property that is reducing a lot of CSS styling here.
- margin: Margin and padding are according to your need.
Note: There have been issues with Mozilla's browser Firefox and in cases, the backdrop-filter doesn't work properly, chrome and edge work fine.
3. <div> in body:
<body>
<div class="container">
<div class="card card-body" style="justify-content: center;">
<!--Contents <h1 >_______</h1> -->
</div>
</div>
</body>
Final Code:
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href=
"https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<style>
body {
background-image: url(
"https://media.geeksforgeeks.org/wp-content/uploads/20200318142240/Bootstrap5.png");
background-repeat: no-repeat;
background-size: 100%;
background-attachment: fixed;
}
h1 {
color: white;
height: 250px;
display: flex;
justify-content: center;
align-items: center;
}
.card {
top: 50%;
box-shadow: 0 0 5px 0;
background: inherit;
backdrop-filter: blur(10px);
margin: 100px;
text-align: center;
}
</style>
</head>
<body>
<div class="container">
<div class="card card-body"
style="justify-content: center;">
<h1>GeeksforGeeks</h1>
</div>
</div>
</body>
</html>
Output:
