title: HTML - Container id or class
body: <p>When writing HTML, what is the industry standard regarding a Container div?<br>
  Is it more popular to have a Container id, or use a container class which I add to the divs I wish to inherit the features?</p>
  
  <p>For example:</p>
  
  <pre><code>&lt;body&gt;
      &lt;div id="container"&gt;
         ...etc
      &lt;/div&gt;
  &lt;/body&gt;
  </code></pre>
  
  <p>or</p>
  
  <pre><code>&lt;body&gt;
      &lt;div id="main" class="container"&gt;
          ...etc
      &lt;/div&gt;
  &lt;/body&gt;
  </code></pre>