jQuery check if pressed key is printable

Question

By using jQuery keydown i'm able to get the target and pressed keyCode

I wanted to check it the pressing key is PRINTABLE KEY

So i used e.key , but this doesn't work in all browsers

Results for e.key :

Mozilla FireFox : MozPrintableKey
Google Chome: undefined
IE: undefined

Is there a all browser compatible way to check if pressing key is printable?

Answer 1

You can define a printable key hash list,if you want it work in all browsers

var printableTable = {
  65:a,
  66:b,
  67:c
  ....
}
var el = document.getElementById("id");
el.onkeypress = function(e) {
    e = e || window.event;
    var keyCode = e.keyCode||e.which;
    if (keyCode in printableTable) {
        alert('this is printableTable!')
    }
});