onlyforbopi
9/19/2018 - 7:20 PM

JS.Events.KeyboardCombinations

JS.Events.KeyboardCombinations

window.onkeydown = processKeyDown;

/* or we could have written:
   window.addEventListener('keypress', processKeyPress);
*/

function processKeyDown(evt) {
  var keys = document.querySelector('#keys');
  
   keys.innerHTML += "keypress: " + evt.key + 
                   " code: " + evt.keyCode + " Modifiers : ";

  var modifiers = "";
  
  if(event.shiftKey)
    modifiers += "SHIFT ";

  if(event.altKey)
    modifiers += "ALT ";

  if(event.ctrlKey)
    modifiers += "CTRL ";

  if(modifiers === "")
    modifiers = "NONE";
  
  keys.innerHTML += modifiers + "<br>";
}
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Example of the 'keypress' event on the window object, awith shift, meta and alt</title>
</head>
  <body>
    <p>Please type some keys and see what happens. Try typing key modifiers at the same time: shift, alt, control</p>
    <div id="keys"></div>
  </body>
</html>