Clear IO messages

[BrooklinJazz]

Is there a way to clear IO messages?

I'd like to be able to listen for button events, and display some IO.puts message, but clear the log before displaying the message.

[josevalim]

Only by reevaluating the cell. Or by having a framing which you can write to and clear from time to time.

[jonatanklosko]

Hey @BrooklinJazz! One of the things you can do is this:

for _ <- Kino.Control.stream(button) do
  IO.write("\rPRESSED BUTTON! #{DateTime.utc_now()}")
end

Note that we use IO.write so no newline is added, and \r clears that line next time we print.

There's also kino frame where you can replace the whole content.

Finally, in kino main we have Kino.animate/2, which could do pretty well here.

[BrooklinJazz]

Great answers! But I don't think they fit my use case. (trying to clear IO.puts coming from something I don't have control over) I have another workaround for my problem, so I'm going to mark the above as a valid answer to the question as asked.