deleteThumbnails.js

// Delete thumbnails if exists. To be used in Alfresco javascript console. Starts from selected space

recurse(space, function(node) {
  var doclib = node.getThumbnail('doclib');
  var webpreview = node.getThumbnail('webpreview');
  var webpreview2 = node.getThumbnail('web-preview');
  var imgpreview = node.getThumbnail('imgpreview');
  var pdf = node.getThumbnail('pdf');
  if(doclib){
    doclib.remove();
  }
  if(webpreview){
    webpreview.remove();
  }
  if(webpreview2){
    webpreview2.remove();
  }
  if(imgpreview){
    imgpreview.remove();
  }
  if(pdf){
    pdf.remove();
  }
});