one solution is
if (event.keyCode === 123 ||
event.ctrlKey && event.shiftKey && event.keyCode === 73 || event.ctrlKey && event.shiftKey && event.keyCode === 67 ||
event.ctrlKey && event.shiftKey && event.keyCode === 75) {
if (show_msg !== '0') {show_toast('inspect_elem');}
return false;
}
BUT the remaining one is pending.is open a new tab of chrome and other browser and open inspect then after in search bar you run your website URL and see, there is open inspect tool also.