data-channels-detach is an example that shows how you can detach a data channel. This allows direct access the the underlying pion/datachannel. This allows you to interact with the data channel using a more idiomatic API based on the io.ReadWriteCloser interface.
The example mirrors the data-channels example.
go install github.com/pion/webrtc/v4/examples/data-channels-detach@latest
The example can be used in the same way as the data-channel example or can be paired with the data-channels-detach-create example. In the latter case; run both example and exchange the offer/answer text by copy-pasting them on the other terminal.