Bootstrap Grid System allows you to create 12 columns across the page. You can use all 12 columns separately.
Grid Classes
There are four classes used in Bootstrap Grid System.
- xs (for phones)
- sm (for tablets)
- md (for desktops)
- lg (for larger desktops)
Grid System |
Extra-small <576px |
Small ≥576px |
Medium ≥768px |
Large ≥992px |
Extra large ≥1200px |
| Max container width | None (auto) | 540px | 720px | 960px | 1140px |
| Class prefix | .col- | .col-sm- | .col-md- | .col-lg- | .col-xl- |
Example
<!DOCTYPE html>
<html lang='en'>
<head>
<title>Bootstrap Example</title>
<meta charset='utf-8'>
<meta name='viewport' content='width=device-width, initial-scale=1'>
<link rel='stylesheet' href='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css'>
<script src='https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js'></script>
<script src='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js'></script>
</head>
<body>
<div class='container-fluid'>
<h1>Hello World!</h1>
<p>Resize the browser window to see the effect.</p>
<div class='row'>
<div class='col-sm-4 bg-danger' >.col-sm-4</div>
<div class='col-sm-4 bg-primary' >.col-sm-4</div>
<div class='col-sm-4 bg-success' >.col-sm-4</div>
</div>
</div>
</body>
</html>
