Center horizontally div elements inside bootstrap? (text-center not working)

Question

I'm having a problem with the text-center class of bootstrap not working, here is it.

I have a div that contains several list and other tags, but when I apply the text-center class to make this center on the screen it does nothing, this applies also in a div that contains divs in shapes, here is my code:

<div class="col-md-12 options-bar text-center">
    <ul class="nav nav-pills">
        <li class="normal-li">Ordenar por: </li>
        <li class="dropdown">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
            Status <span class="caret"></span>
            </a>
            <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li class="divider"></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </li>
        <li class="dropdown">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
            Clientes <span class="caret"></span>
            </a>
            <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li class="divider"></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </li>
        <li class="dropdown">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
            Fecha <span class="caret"></span>
            </a>
            <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li class="divider"></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </li>
        <li class="dropdown">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
            Productos <span class="caret"></span>
            </a>
            <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li class="divider"></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </li>
        <li class="dropdown">
            <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
            Asignación <span class="caret"></span>
            </a>
            <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li class="divider"></li>
                <li><a href="#">Separated link</a></li>
            </ul>
        </li>
        <li class="normal-li">Ver por: </li>
        <li><input type="radio"><label style="color: rgb(46, 116, 241 );">Solicitud</label></li>
        <li><input type="radio"><label style="color: rgb(46, 116, 241 );">Producto</label></li>
        <li id="clock"><span class="glyphicon glyphicon-time"></span></li>
        <li>
            <input type="text" class="form-control" placeholder="Buscar solicitudes">
        </li>
    </ul>
</div>  

As you can see my div with class options-bar is the one that contains the rest, but the class text-center does nothing.

Here is my css stylesheet for options-bar:

.options-bar  {
    line-height: 50px;
    width: 100%;
}

Answer 1

You may use this for centering div's. Add the below code to the div that you want to center.

.centered {
  margin: 0 auto;
}

Note: Usually div's occupy entire width(since its a block element). Make sure that the div which you want to center has width lesser than the screen width. Otherwise you may not see any difference.

Answer 2

You can set the .nav.nav-pills li items to flex-grow: 1; which will cause all the list items to expand equally to fill the space. See this fiddle for an example. I also added a snippet below, but it only looks right in full-screen.

.options-bar  {
    line-height: 50px;
    width: 100%;
}

.nav.nav-pills li {
  flex-grow: 1;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha.6/js/bootstrap.min.js"></script>
<div class="col-md-12 options-bar text-center">
  <ul class="nav nav-pills">
    <li class="normal-li">Ordenar por: </li>
    <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
                        Status <span class="caret"></span>
                        </a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </li>
    <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
                        Clientes <span class="caret"></span>
                        </a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </li>
    <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
                        Fecha <span class="caret"></span>
                        </a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </li>
    <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
                        Productos <span class="caret"></span>
                        </a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </li>
    <li class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#" aria-expanded="false">
                        Asignación <span class="caret"></span>
                        </a>
      <ul class="dropdown-menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </li>
    <li class="normal-li">Ver por: </li>
    <li>
      <input type="radio">
      <label style="color: rgb(46, 116, 241 );">Solicitud</label>
    </li>
    <li>
      <input type="radio">
      <label style="color: rgb(46, 116, 241 );">Producto</label>
    </li>
    <li id="clock"><span class="glyphicon glyphicon-time"></span></li>
    <li>
      <input type="text" class="form-control" placeholder="Buscar solicitudes">
    </li>
  </ul>
</div>

Answer 3

Try this css class in your divs:

.vertCenter {
    display: flex;
    justify-content: center;
    align-items: center;