How is copy protection done, even DevTools does not open?

Question

css

Actually, here are these pretzels - openssource.biz/zima-na-openssource-pozdravlenie-s...
For the first time I see that even F12 does not open. I didn’t even think that it was possible to block it somehow.

Answer 1

Ctrl+Shift+Jworks in Chromium))

Answer 2

Open in chrome

view-source:http://openssource.biz/zima-na-openssource-pozdravlenie-s-nastupayushhimi-prazdnikami-ot-strimershi-kariny.html

and everything looks great.
Almost at the beginning of the document

document.onkeypress = function(event) {
    event = (event || window.event);
    if (event.keyCode === 123) {
        //alert('No F-12');
        return false;
    }
};
document.onmousedown = function(event) {
    event = (event || window.event);
    if (event.keyCode === 123) {
        //alert('No F-keys');
        return false;
    }
};
document.onkeydown = function(event) {
    event = (event || window.event);
    if (event.keyCode === 123) {
        //alert('No F-keys');
        return false;
    }
};

function contentprotector() {
    return false;
}

document.oncontextmenu = contentprotector;
document.onmouseup = contentprotector;
var isCtrl = false;
window.onkeyup = function(e)
{
    if (e.which === 17)
        isCtrl = false;
}

window.onkeydown = function(e)
{
    if (e.which === 17)
        isCtrl = true;
    if (((e.which === 85) || (e.which === 65) || (e.which === 80) || (e.which === 88) || (e.which === 67) || (e.which === 83)) && isCtrl === true)
    {
        return false;
    }
}
isCtrl = false;
document.ondragstart = contentprotector;

The keyCode plate https://www.cambiaresearch.com/articles/15/javascr... 123 is just F12

Answer 3

Can be opened from the menu.
In general, pressing a button on the keyboard is caught and the action is replaced.

Answer 4

Answer 5

Ctrl+Shift+i quite successfully opens the code inspector in Opera. And as implemented, Stepan Romanov has already answered, there is nothing to add. You catch keystroke events, check the key codes and throw out, for example, "return false". The same with the mouse.

Answer 6

Most likely, there are handlers for the keyboard shortcut and the right mouse button.
But the developer panel can be easily opened by clicking on the settings button in the upper right corner, More tools => Developer Tools.