title: FontAwesome Icons in Input Placeholder using React
body: <p>I'm using React for creating an app and I want to use FontAwesome icons for including them into the input placeholder, so that it would look like </p>
  
  <pre><code>&lt;input type="text" placeholder="[here should be the user icon] Username" /&gt;
  </code></pre>
  
  <p>How can I do that? I've used <code>"&amp;#xF007; Username"</code> and it shows only a square instead of an icon. Maybe I forgot something?</p>