Official Ruby on Rails plugin for Filestack File Picker that makes it easy to add powerful file uploading and transformation capabilities to any web or mobile application.
If you pass standard html options (class for example) those options are not passed along to the image tag helper unless you also pass a transform. If you pass a transform it will pull out the transform option then pass along the rest of the tag options.
In: https://github.com/filestack/filestack-rails/blob/4c672d67038b54136f198cfe72a43ee4391ce55e/app/helpers/filestack_rails/application_helper.rb#L38
If you pass standard html options (class for example) those options are not passed along to the image tag helper unless you also pass a transform. If you pass a transform it will pull out the transform option then pass along the rest of the tag options.