CODE EXAMPLE FOR JAVASCRIPT

Javascript keyboard shortcuts

document.onkeyup = function(e) {
    if (e.which == 16) {
        alert('You have press Shift')
    }
    if (e.which == 17 && e.which == 13) {
        alert('You have press CTRL + Enter')
    }
    //Keyboard events codes
    //https://www.toptal.com/developers/keycode
};