How to detect pressed keys on the click of AngularJS

Question

I\'m using angularjs on a web application that I need to figure out how can I detect is keys like ctrl, shift or alt are pressed when I click so

Answer 1

There is no "automated" way using pure JS, but it's relatively simple to track modifier keys' state in global variables. E.g.

window.ctrlDown = false;

document.addEventListener('keydown', function(evt) {
  var e = window.event || evt;
  var key = e.which || e.keyCode;
  if(17 == key) {
    window.ctrlDown = true;
  }
}, false);

document.addEventListener('keyup', function(evt) {
  var e = window.event || evt;
  var key = e.which || e.keyCode;
  if(17 == key) {
    window.ctrlDown = false;
  }
}, false);