How to detect escape key press with pure JS or jQuery?

Note: keyCode is becoming deprecated, use key instead.

function keyPress (e) {
    if(e.key === "Escape") {
        // write your logic here.
    }
}

Code Snippet:

var msg = document.getElementById('state-msg');

document.body.addEventListener('keypress', function(e) {
  if (e.key == "Escape") {
    msg.textContent += 'Escape pressed:'
  }
});

Press ESC key <span id="state-msg"></span>

keyCode is becoming deprecated

It seems keydown and keyup work, even though keypress may not

$(document).keyup(function(e) {
     if (e.key === "Escape") { // escape key maps to keycode `27`
        // <DO YOUR WORK HERE>
    }
});

Which keycode for escape key with jQuery