title: class="jumbotron" in bootstrap not working
body: <p>This is first time I am trying bootstrap. Everything seems to be in place except the class jumbotron is not working. Class container works and brings content in center but jumbotron which is suppose to give some background does not seems to work. (adding or removing this like class="jumbotron" has no effect on page.)</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en"&gt;
    &lt;head&gt;
      &lt;meta charset="utf-8"&gt;
      &lt;meta http-equiv="X-UA-Compatible" content="IE=edge"&gt;
      &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
      &lt;title&gt;Bootstrap 101 Template&lt;/title&gt;
      &lt;link href="./css/bootstrap.min.css" rel="stylesheet"&gt;
  
    &lt;/head&gt;
    &lt;body&gt;
      &lt;div class="container"&gt;
        &lt;div class="jumbotron"&gt;
          &lt;h1&gt;My first Bootstrap website!&lt;/h1&gt;
          &lt;p&gt;This page will grow as we add more and more components from Bootstrap...&lt;/p&gt;
        &lt;/div&gt;
  
        &lt;p&gt;This is another paragraph.&lt;/p&gt;
        &lt;p&gt;This is a paragraph.&lt;/p&gt;
        &lt;p&gt;This is another paragraph.&lt;/p&gt;
      &lt;/div&gt;
      &lt;script src="http://code.jquery.com/jquery.js"&gt;&lt;/script&gt;
      &lt;script src="./js/bootstrap.min.js"&gt;&lt;/script&gt;
    &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I am attaching the <a href="https://i.stack.imgur.com/yXcji.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yXcji.png" alt="image"></a> of ide so you can see my file tree. I checked it myself also and seems I have loaded everything correctly.</p>
  
  <p>Update: redownloading the bootstrap solved the problem with exact same code. somehow my first download was not working correctly. </p>