How to bind the 'Enter key' in Bash readline?

Question

So I learned how to use bind yesterday.

By typing Ctrl+v followed by a key in the terminal, I get a raw character that represents the key. For example: Ctrl+v followed by Esc returns ^[.

My question is, how can I bind the "enter key". The Enter Key returns ^M but when I type the command

bind '"\e^M":"foobar"'

pressing the enter key does not result in foobar being typed in my terminal.

Answer 1

bind '"\e^M":"foobar"'

binds Escape-Enter, not Enter. You just want

bind '"^M":"foobar"'

^M must be the actual control character, not ^ and M. A little easier to type is

bind '"\C-M":"foobar"'

Answer 2

$ alias ^M='echo foobar'
$ ^M
foobar