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Anti-Disable-Devtool

Intercepts scripts from disabling devtools.

// ==UserScript==
// @name         Anti-Disable-Devtool
// @description  Intercepts scripts from disabling devtools.
// @author       Snipcola
// @namespace    https://snipcola.com
// @license      MIT
// @match        *://*/*
// @version      1.0
// @run-at       document-start
// ==/UserScript==

const blacklistedHooks = ["contextmenu"];
const blacklistedScripts = ["disabledevtool", "disable-devtool", "disableinspect", "disable-inspect", "blockdevtool", "block-devtool", "blockinspect", "block-inspect"];

const name = "Anti-Disable-Devtool";
const originalAddEventListener = document.addEventListener;

document.addEventListener = function (type, listener, options) {
    if (blacklistedHooks.includes(type)) console.error(`[${name}] Intercepted event from being hooked:`, { type, listener });
    else originalAddEventListener.call(document, type, listener, options);
};

function observe () {
    if (!document.documentElement) {
        setTimeout(observe, 10);
        return;
    }

    new MutationObserver((mutations) => {
        mutations.forEach(({ addedNodes }) => {
            addedNodes.forEach((node) => {
                if (node.nodeType === 1 && node.tagName === "SCRIPT" && blacklistedScripts.map((s) => node.src?.includes(s)).includes(true)) {
                    node.type = "javascript/intercepted";
                    node.remove();
                    console.error(`[${name}] Intercepted script from being executed:`, { node, source: node.src });
                }
            });
        });
    }).observe(document.documentElement, {
        childList: true,
        subtree: true
    });
}

observe();