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<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/3.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script></head><body> <div class="container"> <h1>Input Group Size</h1> <p>The .input-group class is a container to enhance an input by adding an icon, text or a button in front or behind it as a "help text".</p> <p>Use the .input-group-lg if you want a large input group:</p> <form> <div class="input-group input-group-lg"> <input type="text" class="form-control" placeholder="Search"> <div class="input-group-btn"> <button class="btn btn-default" type="submit"><i class="glyphicon glyphicon-search"></i></button> </div> </div> </form> <br> <p>Use the .input-group-sm if you want a small input group:</p> <form>