The extension depended on old types which are about to be removed. As the code additionally was pretty crufty and didn't provide much in the way of functionality, removing the extension seems to be the best way forward.

now that I realize how easy it is to just manually include this in my app: <%= javascript_include_tag 'xray', nonce: true if Rails.env.development? %> I regret even wasting my time getting it to automatically look for and add a nonce to the auto-injected xray.js script

Wasted too much time getting it to work with old Rubies/Rails, when I think the correct path should be to just remove support for them going forward

This version makes the new client that was added in version 2.6+ the default client, and removes the legacy client. All previously deprecated functionality has been removed (since version 2.5, see below).

Sprockets 3 was a compatibility release to bridge Sprockets 4, and many deprecated things have been removed in version 4.

First, the frame and frameset elements are not deprecated in HTML5, they're obsolete (i.e., they've been removed entirely).

Additionally, if we ever want to standardize more of JSX we need to start moving away from some of the more esoteric legacy behaviors of React.