title: is meta http-equiv value cache control is not supported?
body: <p>i have this code here on a page:</p>
  
  <pre><code>&lt;!-- no cache headers --&gt;
  &lt;meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" /&gt;
  &lt;meta http-equiv="Pragma" content="no-cache" /&gt;
  &lt;meta http-equiv="Expires" content="0" /&gt;
  &lt;!-- end no cache headers --&gt;
  </code></pre>
  
  <p>when i go to other page and hit back button of browser (back to the page where this code written), it is still had the cache state of the page. option is, to add PhaseListener but they told me that adding PhaseListener is an additional codes to maintain. <br />
  <strong>The question is:</strong><br />
  1. is meta tag attribute http-equiv value cache-control is still supported in html in all browser?? because when i check in w3school, there is no value cache-control, pragma, and expires for attribute http-equiv.<br />
  2. if i add phaseListener what would be the advantage against adding meta tags in every page.? <br />
  <strong>Thanks ahead</strong></p>