This post by @changoman inspired many tools for changing Slack's visual themes.

It used to be fairly easy to find and edit Slack's ssb-interop.js file, to load a custom CSS which would change the way it looked.

With the recent release of v4.0, the file is gone, and exists as a bundled file within app.asar, a compressed file.

To achieve the same functionality, you'd have to extract app.asar into a folder, edit the dist/ssb-interop.bundle.js file, and compress the folder back into app.asar before restarting the application.

This means, that Slack's program loads content from the compressed file.

I wonder what the benefits of such an arrangement would be to Slack's internal architecture. Does anyone know?