keydown + keyup events for specific keys

Question

I\'m trying to make the background color change when certain keys are held down. For example, when the \'r\' key is being held down, the background should be red. When the \

Answer 1

$().ready(function() {
  $('body').on("keyup keydown", function() {
    if(e.keyCode == 114 || e.keyCode = 121) {
      $(this).toggleClass("key" + e.keyCode)
    }
  })
})

Now just match the css rules with your css classes