title: In Excel Online, OfficeJS API is not passing the host_Info_ parameter anymore to Excel Add-In
body: <p>I don't know when this started happening or if things have changed but the <code>_host_Info</code> param is not being passed by the framework to my Excel Add-In in Excel Online. </p>
  
  <p>It passes an empty <code>"et="</code> parameter which is OK in this case since I'm in dev mode. The Excel desktop client is still passing it.</p>
  
  <p>This is required by my add-ins to switch functionality between Excel Online and Excel for Windows.</p>
  
  <p>I've checked the docs and can't find that anything has changed.</p>