MODx lacks a real preview function! WordPress, CraftCMS, probably every other CMS out there has a preview of unsaved changes. MODx hasn’t. So I came up with it. It was a tough fight though, as ExtJS is sometimes hard to get at.
This piece of work is absolutely not ready for production environments. So please don’t do it! If this gave you an idea on how to make your own solution for a preview in MODx feel free to post a link in belows comment section.
— herooutoftime (@herooutoftime) November 11, 2014
UPDATE 2014-11-01: I’m currently working on a way better implementation but still in the beginnings. So check out sooner or later.
UPDATE 2014-11-11: Below is a refactor version of MODx (unsaved) previewer!