I'm trying to capture user input (for custom non-html input field) so I need unicode hex key of input character

Others answers suggest something like this:

function detectkey(event) {
    var unicode = event.which || event.keyCode;
    document.getElementById("keystroke").innerHTML = "The pressed key was: " + String.fromCharCode(unicode) +"<br>The Unicode value is:"+ unicode;
}

But both event.which and event.keyCode and also charCode are deprecated Proofs:

• https://developer.mozilla.org/en-US/docs/Web/API/UIEvent/which
• https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode
• https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/charCode

As you can see here https://keycode.info/ There are 2 ways left - event.key and event.code

• But event.key gives you 'shift', 'control' and other stuff
• And event.code is a joke