How can I avoid autorepeated keydown events in JavaScript?

Question

If the user holds down the key, multiple keydown events are fired. For usability reasons I need to use keydown, not keyup, but I want to avoid this situation. My relevant co

Answer 1

Another simple adjustment to the accepted answer to allow for the multiple keys scenario:

var keyAllowed = {};

$(document).keydown(function(e) {
  if (keyAllowed [e.which] === false) return;
  keyAllowed [e.which] = false;
  // code to be executed goes here
});

$(document).keyup(function(e) { 
  keyAllowed [e.which] = true;
});

$(document).focus(function(e) { 
  keyAllowed = {};
});