I was wondering that could it somehow be possible to add onkeydown event to prompt()?
No you can't becouse is a browser native dialog function and it is not available by the DOM.
You can achieve a similar effect with some external javascript library like jQuery.Dialog or bootstrap modal or simplemodal and then attach to that event
Unfortunately No.
The prompt() dialog is a native dialog (not DOM driven) and not open to manipulation via JavaScript.
prompt()
No you can't becouse is a browser native dialog function and it is not available by the DOM.
You can achieve a similar effect with some external javascript library like jQuery.Dialog or bootstrap modal or simplemodal and then attach to that event