Bootstrap - Helper Classes

Carets

Use carets to indicate dropdown functionality and direction. To get this functionality use the class caret with a <span> element.

<p>Caret Example<span class = "caret"></span></p>

Quick Floats

You can float an element to the left or right with class pull-left or pull-right respectively the following example demonstrates this.

<div class = "pull-left">Quick Float to left</div>

<div class = "pull-right">Quick Float to right</div>

To align components in navbars with utility classes, use .navbar-left or .navbar-right instead. See the navbar chapter for details.

Center Content Blocks

Use class center-block to set an element to center.

<div class = "row">
   <div class = "center-block" style = "width:200px; background-color:#ccc;">
      This is an example for center-block
   </div>
</div>

Clearfix

To clear the float of any element, use the .clearfix class.

<div class = "clearfix" style = "background: #D8D8D8;border: 1px solid #000; padding: 10px;">
   
   <div class = "pull-left" style = "background:#58D3F7;">
      Quick Float to left
   </div>
   
   <div class = "pull-right" style = "background: #DA81F5;">
      Quick Float to right
   </div>
   
</div>

Showing and Hiding Content

You can force an element to be shown or hidden (including for screen readers) with the use of classes .show and .hidden.

<div class = "row" style = "padding: 91px 100px 19px 50px;">
   
   <div class = "show" style = "left-margin:10px; width:300px; background-color:#ccc;">
      This is an example for show class
   </div>
   
   <div class = "hidden" style = "width:200px; background-color:#ccc;">
      This is an example for hide class
   </div>
   
</div>

Screen Reader Content

You can hide an element to all devices except screen readers with the class .sr-only.

<div class = "row" style = "padding: 91px 100px 19px 50px;">
   <form class = "form-inline" role = "form">
      
      <div class = "form-group">
         <label class = "sr-only" for = "email">Email address</label>
         <input type = "email" class = "form-control" placeholder = "Enter email">
      </div>
      
      <div class = "form-group">
         <label class = "sr-only" for = "pass">Password</label>
         <input type = "password" class = "form-control" placeholder = "Password">
      </div>
      
   </form>
</div>