How to center buttons in Twitter Bootstrap 3?

Question

I am building a form in Twitter Bootstrap but I'm having issues with centering the button below the input in the form. I have already tried applying the center-block class to the button but that didn't work. How should I fix this?

Here is my code.

<!-- Button -->
<div class="form-group">
    <label class="col-md-4 control-label" for="singlebutton"></label>
    <div class="col-md-4">
        <button id="singlebutton" name="singlebutton" class="btn btn-primary center-block">
            Next Step!
        </button>
    </div>
</div>

Answer 1

Wrap the Button in div with "text-center" class.

Just change this:

<!-- wrong -->
<div class="col-md-4 center-block">
    <button id="singlebutton" name="singlebutton" class="btn btn-primary center-block">Next Step!</button>
</div>

To this:

<!-- correct -->
<div class="col-md-4 text-center"> 
    <button id="singlebutton" name="singlebutton" class="btn btn-primary">Next Step!</button> 
</div>

Edit

As of BootstrapV4, center-block was dropped #19102 in favor of m-*-auto