Trouble pulling button in btn-group to right - css

Question

I have the following code which displays some buttons:
Fiddle
<div class="btn-toolbar" role="toolbar" aria-label="Toolbar with button groups">
<div class="btn-group" role="group" aria-label="Toolbar Group">
<button type="button" class="btn btn-default as-btn-text as-add-btn">Add</button>
<button type="button" class="btn btn-default as-btn-text as-delete-btn">Delete</button>
<button type="button" class="btn btn-default dropdown-toggle as-btn-text as-conf-btn" data-toggle="dropdown" aria-expanded="false">Configuration <span class="caret"></span>
</button>
<ul class="dropdown-menu as-toolbar-dropdown" role="menu">
<li>A
</li>
<li>B
</li>
</ul>
<button type="button" class="btn btn-default as-btn-text as-refresh-btn">X</button>
</div>
</div>
I want to pull the "X" to the far right of the group. I have tried .pull-right, float:right but neither seem to work.
Any ideas appreciated!

Answer 1

I would put the close ("X") button in its own .button-group and pull the group to the right:
<!-- previous button location -->
</div><!-- close the existing group -->
<div class="button-group pull-right">
<!-- new button location -->
<button type="button" class="btn btn-default as-btn-text as-refresh-btn">X</button>
</div>
</div><!-- end .btn-toolbar -->
Here's an update to your fiddle.
The advantage to this approach is that you get the correct button rounding based on the .button-group rules and you don't need to alter or override existing Bootstrap framework CSS.

Answer 2

Updated HTML
<div class="btn-toolbar" role="toolbar" aria-label="Toolbar with button groups">
<div id ="b"class="btn-group" role="group" aria-label="Toolbar Group">
<button type="button" class="btn btn-default as-btn-text as-add-btn">Add</button>
<button type="button" class="btn btn-default as-btn-text as-delete-btn">Delete</button>
<button type="button" class="btn btn-default dropdown-toggle as-btn-text as-conf-btn" data-toggle="dropdown" aria-expanded="false">
Configuration
<span class="caret"></span>
</button>
<ul class="dropdown-menu as-toolbar-dropdown" role="menu">
<li>A</li>
<li>B</li>
</ul>
<button type="button" id="right" class="btn btn-default as-btn-text as-refresh-btn">X</button>
</div>
</div>
Updated CSS:
#b{
width:100%;
}
#right{
float:right;
}
Working Example:http://jsfiddle.net/tmurmvnx/

Answer 3

In bootstrap 4 you can use the strong text class, check this simple example:
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<div class="btn-group btn-group-lg float-right" role="group">
<button type="submit" class="btn btn-dark">
Btn 1
</button>
<button type="submit" class="btn btn-primary">
Btn 2
</button>
</div>
For more information check this documentation:
https://getbootstrap.com/docs/4.0/utilities/float/
https://getbootstrap.com/docs/4.0/utilities/text/#text-alignment