title: How to combine class and ID in CSS selector?
body: <p>If I have the following div:</p>
  
  <pre><code>&lt;div class="sectionA" id="content"&gt;
      Lorem Ipsum...
  &lt;/div&gt;
  </code></pre>
  
  <p>Is there a way to define a style that expresses the idea "A div with <code>id='content'</code> AND <code>class='myClass'</code>"?</p>
  
  <p>Or do you have simply go one way or the other as in </p>
  
  <pre><code>&lt;div class="content-sectionA"&gt;
      Lorem Ipsum...
  &lt;/div&gt;
  </code></pre>
  
  <p>Or</p>
  
  <pre><code>&lt;div id="content-sectionA"&gt;
      Lorem Ipsum...
  &lt;/div&gt;
  </code></pre>