Bootstrap requires a containing element to wrap site contents. Containers are used to pad the content inside of them, Following are the container classes available in bootstrap 5
.container : a responsive fixed width container
.container-fluid : full width container, wrapping the entire width of the viewport
.container-{breakpoint}, which is width: 100%
| Extra small <576px | Small ≥576px | Medium ≥768px | Large ≥992px | X-Large ≥1200px | XX-Large ≥1400px | |
.container | 100% | 540px | 720px | 960px | 1140px | 1320px |
|---|---|---|---|---|---|---|
.container-sm | 100% | 540px | 720px | 960px | 1140px | 1320px |
.container-md | 100% | 100% | 720px | 960px | 1140px | 1320px |
.container-lg | 100% | 100% | 100% | 960px | 1140px | 1320px |
.container-xl | 100% | 100% | 100% | 100% | 1140px | 1320px |
.container-xxl | 100% | 100% | 100% | 100% | 100% | 1320px |
.container-fluid | 100% | 100% | 100% | 100% | 100% | 100% |
Example container
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<title>Hello, world!</title>
</head>
<body>
<!-- Sample Code ! -->
<div class="container">
<h1>My First Bootstrap Page</h1>
<p>This is some text.</p>
</div>
<!-- Optional JavaScript; choose one of the two! -->
<!-- Option 1: Bootstrap Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
<!-- Option 2: Separate Popper and Bootstrap JS -->
<!--
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.2/dist/umd/popper.min.js" integrity="sha384-IQsoLXl5PILFhosVNubq5LC7Qb9DXgDA9i+tQ8Zj3iwWAwPtgFTxbJ8NT4GN1R8p" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.min.js" integrity="sha384-cVKIPhGWiC2Al4u+LWgxfKTRIcfu0JTxR+EQDz/bgldoEyl4H0zUF0QKbrJ0EcQF" crossorigin="anonymous"></script>
-->
</body>
</html>Copy the above code to a notepad and save it as example.html then open it in a browser.
The XXL breakpoint (=1400px) is new in Bootstrap 5, while the largest breakpoint in Bootstrap 4 is Extra large (=1200px).
Change the .container class to .container-fluid and see the changes . this will always span the entire width of the screen (width is always 100%):
