Is it possible to disable esc/F11 key during full screen mode of webpage, programmatically? [duplicate]

Answer 1

document.addEventListener("keydown", e => {
    if(e.key == "F11") e.preventDefault();
});

Answer 2

With jQuery you can disable it listening to the keydown event:

$(document).on("keydown",function(ev){
	console.log(ev.keyCode);
	if(ev.keyCode===27||ev.keyCode===122) return false
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

keycode 27 stands for the ESC key and 122 for the F11. This was tested in chrome, maybe for other browsers can be other number