Tcl had event-driven programming much longer than JavaScript (and much more pleasant). I think Erlang may have been the first production platform to do it, but

Tcl had event-driven programming much longer than JavaScript (and much more pleasant). I think Erlang may have been the first production platform to do it, but I'm not sure about that. I suspect the idea has been around for a very long time, and there's probably some obscure language out there from 1960s IBM mainframes that came up with the idea.