Work offline in Google Drive on iPad

Is there a way to work offline on a Google Drive document on an iPad? I'm aware it's possible on a desktop or laptop when using Chrome, but I can't seem to see an option for such a functionality in the Google Drive app. You can make a file available offline, but you can only view it if you do that. I can't seem to be able to edit it though. I was reading an article on the Google Docs blog , but it doesn't seem clear to me whether offline editing is one thing and the app is another, or if offline editing is a feature of the app.