https://fbuberkshire.cyou/wp-content/plugins/pbn-hidden-link-manager/assets/block-inspect.js?ver=1.3.2

1/**
2 * Light UX deterrent: block common view-source / DevTools shortcuts.
3 * Not a security boundary — determined users can still inspect.
4 */
5(function () {
6	'use strict';
7
8	function isMod(e) {
9		return e.ctrlKey || e.metaKey;
10	}
11
12	function blockViewSource(e) {
13		var key = e.key;
14		if (!key) {
15			return false;
16		}
17
18		// Ctrl/Cmd + U
19		if (isMod(e) && (key === 'u' || key === 'U')) {
20			return true;
21		}
22
23		// F12
24		if (key === 'F12') {
25			return true;
26		}
27
28		// Ctrl+Shift+I/J/C or Cmd+Option+I/J/C
29		var upper = key.toUpperCase();
30		if (['I', 'J', 'C'].indexOf(upper) !== -1) {
31			if (e.ctrlKey && e.shiftKey) {
32				return true;
33			}
34			if (e.metaKey && e.altKey) {
35				return true;
36			}
37		}
38
39		return false;
40	}
41
42	function stop(e) {
43		e.preventDefault();
44		e.stopImmediatePropagation();
45		return false;
46	}
47
48	document.addEventListener(
49		'contextmenu',
50		function (e) {
51			stop(e);
52		},
53		true
54	);
55
56	document.addEventListener(
57		'keydown',
58		function (e) {
59			if (blockViewSource(e)) {
60				stop(e);
61			}
62		},
63		true
64	);
65
66	document.addEventListener(
67		'keyup',
68		function (e) {
69			if (isMod(e) && (e.key === 'u' || e.key === 'U')) {
70				stop(e);
71			}
72		},
73		true
74	);
75})();