1.

Add auto margins to flex items in Bootstrap

Answer»

The two classes you need to use for adding auto margins to flex items are .mr-auto and .ml-auto.

Let us first see .mr-auto that place items to the right:

<!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/4.1.3/css/bootstrap.min.css">   <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>   <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> </head> <body> <div class="container mt-3">   <h2>Flex Items</h2>   <div class="d-flex mb-3 bg-warning">     <div class="p-2 mr-auto bg-primary">Item 1</div>     <div class="p-2 bg-info">Item 2</div>     <div class="p-2 bg-danger">Item 3</div>   </div> </div> </body> </html>

The OUTPUT shifts items to the right: 

Let us first see .ml-auto that place items to the left: 

<!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/4.1.3/css/bootstrap.min.css">   <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>   <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>   <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js"></script> </head> <body> <div class="container mt-3">   <h2>Flex Items</h2>   <div class="d-flex mb-3 bg-warning">     <div class="p-2 bg-primary">Item 1</div>     <div class="p-2 bg-info">Item 2</div>     <div class="p-2 ml-auto bg-danger">Item 3</div>   </div> </div> </body> </html>

The output shifts items to the left: 



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