title: React Native, run js script in background
body: <p>Please help me to show a simple way to run an JS script in background on both iOS and Android, and update the JS script (file) from remote server?</p>
  
  <p>This is what I am truing to do.</p>
  
  <ol>
  <li>Run JS-file (function) in background</li>
  <li>Start/stop function from WebView</li>
  <li>Download updated version of the JS-file </li>
  </ol>
  
  <p>Can anyone help me in the right direction? </p>