title: I'm trying to use font awesome icon in css pseudo element but it's not working what is wrong with my code?
body: <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;html&gt;
  &lt;head&gt;
  
    &lt;style&gt;
  h1::after {
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    content: "\f5fc";
  }
    &lt;/style&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
    &lt;h1&gt;Heading&lt;/h1&gt;
  &lt;/body&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>
  <p>is there anything wrong in this code ??
  I have changed font weight several times but it keeps on showing that hollow box</p>