title: How to exclude file extensions and languages from "format on save" in VSCode?
body: <p>Currently in VSCode settings you can configure format on save as following: </p>
  
  <pre class="lang-json prettyprint-override"><code>"editor.formatOnSave": true
  </code></pre>
  
  <p>I want to exclude some file extensions, for example only format JavaScript but not HTML files.</p>