javascript
(function() {
document.addEventListener('contextmenu', function(e) {
e.preventDefault();
return false;
});
document.addEventListener('keydown', function(e) {
const key = e.key || e.keyCode || e.which;
const ctrl = e.ctrlKey || e.metaKey;
const shift = e.shiftKey;
const alt = e.altKey;
if (key === 'F12' || e.keyCode === 123) {
e.preventDefault();
e.stopPropagation();
return false;
}
if (ctrl && shift && (key === 'I' || key === 'i' || e.keyCode === 73)) {
e.preventDefault();
e.stopPropagation();
return false;
}
if (ctrl && shift && (key === 'J' || key === 'j' || e.keyCode === 74)) {
e.preventDefault();
e.stopPropagation();
return false;
}
if (ctrl && (key === 'U' || key === 'u' || e.keyCode === 85)) {
e.preventDefault();
e.stopPropagation();
return false;
}
if (ctrl && shift && (key === 'C' || key === 'c' || e.keyCode === 67)) {
e.preventDefault();
e.stopPropagation();
return false;
}
if (ctrl && (key === 'S' || key === 's' || e.keyCode === 83)) {
e.preventDefault();
e.stopPropagation();
return false;
}
return true;
});
})();