How to disable printing on a website

<script>    //Prevents Ctrl + P    //From https://stackoverflow.com/a/47848090/1928691    window.addEventListener('keydown', function(event) {        if (event.keyCode === 80 && (event.ctrlKey || event.metaKey) && !event.altKey && (!event.shiftKey || window.chrome || window.opera)) {            event.preventDefault();            if (event.stopImmediatePropagation) {                event.stopImmediatePropagation();            } else {                event.stopPropagation();            }            return;            }    }, true);    //Disables text selection and copying    //From https://gist.github.com/pbaruns/a24ad79b027956ed5d77fd3e6c201467    if (typeof document.onselectstart!="undefined" ) {         document.onselectstart=new Function ("return false" );    }     else {         document.onmousedown=new Function ("return false" );         document.onmouseup=new Function ("return true" );    }</script><style>    /*From https://stackoverflow.com/a/3359980/1928691*/    @media print {        html, body {            display: none;  /* hide whole page */        }    }</style>