title: Font awesome icon in placeholder not showing up unless font weight set to 600
body: <p>I upgraded from Font Awesome 4.4 to 5 and I went from using the downloaded files to the CDN.</p>
  
  <p>The fonts work fine, but when using an icon in my search field input placeholder it not showing like I want:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>input {
    font-family: Arial, 'Font Awesome 5 Free';
    font-weight: 500;
    color: #777;
    font-size: 18px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.13/css/all.css" integrity="sha384-DNOHZ68U8hZfKXOrtjWvjxusGo9WQnrNx2sqG0tfsghAvtVlRW3tvkXWZh58N9jp" crossorigin="anonymous"&gt;
  
  This won't show&lt;br&gt;
  &lt;input placeholder=" Location"&gt;&lt;br&gt;
  
  This one is showing&lt;br&gt;
  &lt;input placeholder=" Location" style="font-weight:600"&gt;&lt;br&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>The problem I'm having is it only shows up if the font weight of the search field is 600 or more! If I set the font weight to 500 the font icon disappears!</p>
  
  <p>The issue seems to be related to the fact that the regular icon belong to the PRO version and I can only use the solid one (as explained here : <a href="https://stackoverflow.com/questions/49754892/font-awesome-shows-square-instead-of-icon-when-used-directly-in-css">Font Awesome shows square instead of icon when used directly in CSS</a>) </p>
  
  <p>Is there any way to use the icon as a placehodler (as I want it to disappear when typing a text) BUT without making the text bold. The icon can be bold, but not the text.</p>
  
  <p>Here is the website where you can also see the result:</p>