title: how to create borders with bootstrap 3 border class
body: <p>I use the class border-* of bootstrap, but can't see the borders.
   1. What am I missing ?
   2. Where do I change the thikness of the border ?
   3. Why there is a silght gap, the white spot between the cells in the outcoume result of the following code ?
   4. I used the class rounded-0 and it still seams to be exists, why ?</p>
  
  <p>Thanks un advance for any help.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>div {
  height: 50px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>    &lt;!-- Jquery --&gt;
      &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"&gt;&lt;/script&gt;
      &lt;!-- BootStrap --&gt;
      &lt;!-- Latest compiled and minified CSS --&gt;
      &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"&gt;
      &lt;!-- Optional theme --&gt;
      &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" crossorigin="anonymous"&gt;
      &lt;!-- Latest compiled and minified JavaScript --&gt;
      &lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"&gt;&lt;/script&gt;
      &lt;!--------------------------------------------------------------------------&gt;
      &lt;div class="container-fluid row"&gt;
        &lt;h1 class = 'page-header'&gt;
        Why the borders are not visible ?
        &lt;/h1&gt;
        &lt;h5&gt;And why the radius box is still rounded if the class is rounded-0 ?&lt;/h5&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4'&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4 border-top-0'&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4 '&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4 border-left-0'&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4 '&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4  border-right-0'&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4'&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4 border-bottom-0'&gt;&lt;/div&gt;
        &lt;div class='btn btn-primary rounded-0 col-xs-4'&gt;&lt;/div&gt;
       &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>