<style>
body{
    -webkit-user-select:none;
    -moz-user-select:none;
    -ms-user-select:none;
    user-select:none;
}
img{
    -webkit-user-drag:none;
    user-drag:none;
    pointer-events:none;
}
</style>

<script>
// Disable right click
document.addEventListener("contextmenu", function(e){
    e.preventDefault();
});

// Disable copy/cut/select
document.addEventListener("copy", function(e){
    e.preventDefault();
});

document.addEventListener("cut", function(e){
    e.preventDefault();
});

document.addEventListener("selectstart", function(e){
    e.preventDefault();
});

// Disable common shortcuts
document.addEventListener("keydown", function(e){
    if (e.ctrlKey &&
        ["a","c","s","p","x"].includes(e.key.toLowerCase())) {
        e.preventDefault();
    }
});
</script>