Ionic Framework Button Not Showing
<p>The following button icon at the side menu is not showing...</p>

<pre><code>&lt;ion-side-menus&gt;
    &lt;ion-pane ion-side-menu-content&gt;
        &lt;ion-nav-bar class="bar-balanced"&gt;
          &lt;button menu-toggle="left" class="button button-icon icon ion-navicon"&gt;&lt;/button&gt;
        &lt;/ion-nav-bar&gt;
    &lt;/ion-pane&gt;

    &lt;ion-side-menu side="left"&gt;&lt;/ion-side-menu&gt;
&lt;/ion-side-menus&gt;
</code></pre>