If you develop an app for Nextcloud, it makes sense to use the same support matrix to ensure that your code is compatible with the same browsers. For this purpose we created and released a shared Browserslist config:
To use the shared config, install it via
npm and let the share config extend your specific one (if any). Details about installation and usage can be found on the package website.
I hope this is useful for Nextcloud app developers. Any feedback or changes on the support matrix may be submitted on Github