Bypass website anti-DevTools restrictions and enable full developer access
// ==UserScript==
// @name DevTools Bypass
// @name:vi Bỏ Qua Chặn DevTools
// @name:zh-CN 开发工具限制绕过
// @name:en DevTools Bypass
// @namespace https://greasyfork.org/vi/users/1195312-renji-yuusei
// @version 4.0.0
// @description Bypass website anti-DevTools restrictions and enable full developer access
// @description:vi Vô hiệu hóa các biện pháp chặn DevTools của website và cho phép truy cập đầy đủ
// @description:zh-CN 绕过网站的反开发者工具限制，启用完整的开发者访问权限
// @description:en Bypass website anti-DevTools restrictions and enable full developer access
// @author Yuusei
// @match *://*/*
// @grant unsafeWindow
// @run-at document-start
// @license GPL-3.0-only
// ==/UserScript==
(() => {
"use strict";
// Configuration
const CONFIG = {
// Enhanced regex to detect and neutralize anti-DevTools code
antiDevToolsRegex: new RegExp(
[
// Debugger statements - remove completely
/(?:^|[;\s{(,])\s*debugger\s*(?:[;\s}),]|$)/.source,
// Function constructor with debugger
/(?:new\s+)?Function\s*\(\s*['"`][^'"`]*debugger[^'"`]*['"`]\s*\)/
.source,
// Timer-based debugger injections
/(?:setTimeout|setInterval)\s*\(\s*(?:function[^{]*\{[^}]*debugger[^}]*\}|['"`][^'"`]*debugger[^'"`]*['"`])\s*[,)]/
.source,
// eval with debugger
/eval\s*\(\s*['"`][^'"`]*debugger[^'"`]*['"`]\s*\)/.source,
// Console detection tricks
/console\s*\[\s*['"`](?:log|warn|error|info|debug|clear|table|dir|group|time)['"`]\s*\]\s*\.\s*toString/
.source,
/console\.(?:log|warn|error|info|debug|trace|clear|table|dir|group|time)\s*\.\s*toString\s*\(\s*\)/
.source,
// DevTools size detection
/(?:window\.(?:outer|inner)(?:Width|Height)|screen\.(?:width|height))\s*[-+*\/]\s*(?:window\.(?:outer|inner)(?:Width|Height)|screen\.(?:width|height))\s*[<>=!]+\s*\d+/
.source,
// Performance timing detection
/(?:performance\.now|Date\.now)\s*\(\s*\)\s*[-+]\s*(?:performance\.now|Date\.now)\s*\(\s*\)\s*[><=!]+\s*\d+/
.source,
// Known anti-DevTools libraries
/(?:FuckDevTools|devtools-detector|disable-devtool|console-ban|anti-debug|devtools-detect|fuck-debugger)/
.source,
// DevTools event listeners
/(?:addEventListener|on)\s*\(\s*['"`](?:keydown|keyup|keypress|contextmenu|selectstart|copy|cut|paste|dragstart)['"`][^)]*(?:F12|preventDefault|stopPropagation)/
.source,
// Console override attempts
/console\s*=\s*(?:\{\}|null|undefined|false)/.source,
/window\.console\s*=/.source,
// DevTools detection via exceptions
/try\s*\{[^}]*(?:debugger|console)[^}]*\}\s*catch/.source,
// Stack trace analysis for DevTools detection
/(?:Error|TypeError|ReferenceError)\(\)\.stack\.(?:split|match|replace|indexOf|includes|search)/
.source,
// Arguments.callee detection (used in some anti-debug)
/arguments\.callee/.source,
// toString override for detection
/toString\s*=\s*function[^{]*\{[^}]*(?:devtools|debug|console)/.source,
].join("|"),
"gim"
),
protection: {
neutralizeDebugger: true,
enableDevToolsKeys: true,
enableRightClick: true,
enableTextSelection: true,
enableCopyPaste: true,
preventAntiDebugTimers: true,
restoreConsole: true,
preventKeyBlocking: true,
},
logging: {
enabled: true,
prefix: "[DevTools Bypass]",
verbose: false,
},
};
// Logger
class Logger {
static #logHistory = new Map();
static #maxLogsPerType = 5;
static #canLog(type, message) {
const key = `${type}:${message}`;
const count = this.#logHistory.get(key) || 0;
if (count >= this.#maxLogsPerType) return false;
this.#logHistory.set(key, count + 1);
return true;
}
static info(message, ...args) {
if (CONFIG.logging.enabled && this.#canLog("info", message)) {
console.info(CONFIG.logging.prefix, message, ...args);
}
}
static warn(message, ...args) {
if (CONFIG.logging.enabled && this.#canLog("warn", message)) {
console.warn(CONFIG.logging.prefix, message, ...args);
}
}
static debug(message, ...args) {
if (
CONFIG.logging.enabled &&
CONFIG.logging.verbose &&
this.#canLog("debug", message)
) {
console.debug(CONFIG.logging.prefix, message, ...args);
}
}
}
// Store original functions before they get overridden
const ORIGINAL = {
// Core functions
Function: window.Function,
eval: window.eval,
setTimeout: window.setTimeout,
setInterval: window.setInterval,
clearTimeout: window.clearTimeout,
clearInterval: window.clearInterval,
// Timing
Date: window.Date,
now: Date.now,
performance: window.performance?.now?.bind(window.performance),
// DOM
addEventListener: window.addEventListener,
removeEventListener: window.removeEventListener,
createElement: document.createElement,
// Object methods
defineProperty: Object.defineProperty,
getOwnPropertyDescriptor: Object.getOwnPropertyDescriptor,
keys: Object.keys,
// Console (store before potential override)
console: {},
};
// Backup console methods
[
"log",
"warn",
"error",
"info",
"debug",
"trace",
"dir",
"table",
"group",
"groupEnd",
"clear",
"time",
"timeEnd",
].forEach((method) => {
if (console[method]) {
ORIGINAL.console[method] = console[method].bind(console);
}
});
// Code Neutralizer - Cleans anti-DevTools code
class CodeNeutralizer {
static neutralize(code) {
if (typeof code !== "string" || !code.trim()) {
return code;
}
try {
let neutralized = code;
// Replace anti-DevTools patterns
neutralized = neutralized.replace(
CONFIG.antiDevToolsRegex,
(match, ...args) => {
const replacement = this.#getReplacement(match);
Logger.debug(
"Neutralized anti-DevTools code:",
match.substring(0, 100)
);
return replacement;
}
);
// Handle encoded debugger statements
neutralized = neutralized.replace(
/\\u0064\\u0065\\u0062\\u0075\\u0067\\u0067\\u0065\\u0072/g,
""
);
neutralized = neutralized.replace(
/\u0064\u0065\u0062\u0075\u0067\u0067\u0065\u0072/g,
""
);
// Remove obfuscated debugger
neutralized = neutralized.replace(/['"`]debugger['"`]/g, '""');
neutralized = neutralized.replace(/\bdebugger\b/g, "");
// Neutralize console blocking
neutralized = neutralized.replace(
/console\s*=\s*(?:\{\}|null|undefined|false)/g,
"console = console"
);
neutralized = neutralized.replace(/window\.console\s*=\s*[^;]+/g, "");
return neutralized;
} catch (e) {
Logger.warn("Code neutralization failed:", e.message);
return code;
}
}
static #getReplacement(match) {
if (match.includes("debugger")) {
return "/* debugger statement removed */";
}
if (match.includes("console")) {
return "/* console detection removed */";
}
if (match.includes("addEventListener") || match.includes("keydown")) {
return "/* key blocking removed */";
}
if (match.includes("performance") || match.includes("Date.now")) {
return "/* timing detection removed */";
}
return "/* anti-DevTools code removed */";
}
}
// DevTools Protection Bypass
class DevToolsProtectionBypass {
static apply() {
this.#neutralizeFunctionConstructor();
this.#neutralizeEval();
this.#neutralizeTimers();
this.#preventKeyBlocking();
this.#restoreRightClick();
this.#restoreTextSelection();
this.#restoreConsole();
this.#preventTimingDetection();
this.#neutralizeDebuggerTricks();
this.#patchMutationObserver();
this.#restoreClipboard();
this.#preventErrorOverrides();
}
// Neutralize Function constructor to prevent debugger injection
static #neutralizeFunctionConstructor() {
const handler = {
construct(target, args) {
if (args[0] && typeof args[0] === "string") {
args[0] = CodeNeutralizer.neutralize(args[0]);
}
return Reflect.construct(target, args);
},
apply(target, thisArg, args) {
if (args[0] && typeof args[0] === "string") {
args[0] = CodeNeutralizer.neutralize(args[0]);
}
return Reflect.apply(target, thisArg, args);
},
};
try {
window.Function = new Proxy(ORIGINAL.Function, handler);
if (typeof unsafeWindow !== "undefined") {
unsafeWindow.Function = window.Function;
}
Logger.info("Function constructor protected");
} catch (e) {
Logger.warn("Function protection failed:", e.message);
}
}
// Neutralize eval to prevent debugger injection
static #neutralizeEval() {
const safeEval = function (code) {
if (typeof code === "string") {
code = CodeNeutralizer.neutralize(code);
}
return ORIGINAL.eval.call(this, code);
};
try {
Object.defineProperty(window, "eval", {
value: safeEval,
writable: false,
configurable: false,
});
if (typeof unsafeWindow !== "undefined") {
unsafeWindow.eval = safeEval;
}
Logger.info("eval function protected");
} catch (e) {
Logger.warn("eval protection failed:", e.message);
}
}
// Neutralize timers that might inject debugger
static #neutralizeTimers() {
const wrapTimer = (original, name) => {
return function (handler, delay, ...args) {
if (typeof handler === "string") {
handler = CodeNeutralizer.neutralize(handler);
}
return original.call(this, handler, delay, ...args);
};
};
window.setTimeout = wrapTimer(ORIGINAL.setTimeout, "setTimeout");
window.setInterval = wrapTimer(ORIGINAL.setInterval, "setInterval");
Logger.info("Timer functions protected");
}
// Prevent key blocking (F12, Ctrl+Shift+I, etc.)
static #preventKeyBlocking() {
const events = ["keydown", "keypress", "keyup"];
events.forEach((eventType) => {
// Override addEventListener to prevent key blocking
const originalAddListener = ORIGINAL.addEventListener;
document.addEventListener = function (type, listener, options) {
if (type === eventType && typeof listener === "function") {
const originalListener = listener;
listener = function (event) {
const key = event.key?.toLowerCase();
const code = event.code?.toLowerCase();
// Allow DevTools keys
const isDevToolsKey =
key === "f12" ||
(event.ctrlKey &&
event.shiftKey &&
["i", "j", "c"].includes(key)) ||
(event.ctrlKey && key === "u");
if (isDevToolsKey) {
Logger.debug("Allowing DevTools key:", key);
return; // Don't call the original listener
}
return originalListener.call(this, event);
};
}
return originalAddListener.call(this, type, listener, options);
};
// Also handle window events
window.addEventListener = document.addEventListener;
});
// Block existing key event listeners by overriding preventDefault
const originalPreventDefault = Event.prototype.preventDefault;
Event.prototype.preventDefault = function () {
const key = this.key?.toLowerCase();
const isDevToolsKey =
key === "f12" ||
(this.ctrlKey && this.shiftKey && ["i", "j", "c"].includes(key)) ||
(this.ctrlKey && key === "u");
if (
isDevToolsKey &&
(this.type === "keydown" ||
this.type === "keypress" ||
this.type === "keyup")
) {
Logger.debug("Prevented preventDefault on DevTools key:", key);
return; // Don't prevent default for DevTools keys
}
return originalPreventDefault.call(this);
};
Logger.info("Key blocking prevention enabled");
}
// Restore right-click context menu
static #restoreRightClick() {
// Override contextmenu event blocking
const originalAddListener = document.addEventListener;
document.addEventListener = function (type, listener, options) {
if (type === "contextmenu") {
// Replace with a dummy function that doesn't block
listener = function (e) {
Logger.debug("Context menu allowed");
return true;
};
}
return originalAddListener.call(this, type, listener, options);
};
// Also handle oncontextmenu attribute
const observer = new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
if (
mutation.type === "attributes" &&
mutation.attributeName === "oncontextmenu"
) {
mutation.target.removeAttribute("oncontextmenu");
Logger.debug("Removed oncontextmenu attribute");
}
});
});
observer.observe(document.documentElement, {
attributes: true,
subtree: true,
attributeFilter: ["oncontextmenu"],
});
Logger.info("Right-click restored");
}
// Restore text selection
static #restoreTextSelection() {
// Override selectstart event blocking
const originalAddListener = document.addEventListener;
const blockedEvents = ["selectstart", "dragstart", "copy", "cut"];
document.addEventListener = function (type, listener, options) {
if (blockedEvents.includes(type)) {
listener = function (e) {
Logger.debug("Selection/copy event allowed:", type);
return true;
};
}
return originalAddListener.call(this, type, listener, options);
};
// Remove CSS that prevents text selection
const style = document.createElement("style");
style.textContent = `
*, *::before, *::after {
-webkit-user-select: text !important;
-moz-user-select: text !important;
-ms-user-select: text !important;
user-select: text !important;
}
`;
document.head.appendChild(style);
Logger.info("Text selection restored");
}
// Restore console if it was overridden
static #restoreConsole() {
try {
// Check if console was disabled/overridden
if (!window.console || typeof window.console.log !== "function") {
window.console = ORIGINAL.console;
Logger.info("Console restored");
}
// Ensure console methods are working
Object.keys(ORIGINAL.console).forEach((method) => {
if (!console[method] || typeof console[method] !== "function") {
console[method] = ORIGINAL.console[method];
}
});
// Prevent future console overrides
Object.defineProperty(window, "console", {
value: window.console,
writable: false,
configurable: false,
});
} catch (e) {
Logger.warn("Console restoration failed:", e.message);
}
}
// Prevent timing-based DevTools detection
static #preventTimingDetection() {
// Add small random delays to timing functions to break detection
const addNoise = () => Math.random() * 2;
try {
Object.defineProperty(Date, "now", {
value: () => ORIGINAL.now() + addNoise(),
writable: false,
configurable: false,
});
if (window.performance?.now) {
Object.defineProperty(window.performance, "now", {
value: () => ORIGINAL.performance() + addNoise(),
writable: false,
configurable: false,
});
}
Logger.info("Timing detection prevented");
} catch (e) {
Logger.warn("Timing protection failed:", e.message);
}
}
// Neutralize debugger tricks
static #neutralizeDebuggerTricks() {
// Override toString methods that might be used for detection
const safeToString = function () {
return this.name
? `function ${this.name}() { [native code] }`
: "function() { [native code] }";
};
try {
// Protect critical functions from toString inspection
window.Function.prototype.toString = safeToString;
window.eval.toString = () => "function eval() { [native code] }";
Logger.info("Debugger tricks neutralized");
} catch (e) {
Logger.warn("Debugger trick neutralization failed:", e.message);
}
}
// Monitor and clean injected scripts
static #patchMutationObserver() {
if (!window.MutationObserver) return;
try {
new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
mutation.addedNodes.forEach((node) => {
if (node.nodeType === Node.ELEMENT_NODE) {
// Clean script content
if (node.tagName === "SCRIPT" && node.textContent) {
const originalContent = node.textContent;
const cleanedContent =
CodeNeutralizer.neutralize(originalContent);
if (originalContent !== cleanedContent) {
node.textContent = cleanedContent;
Logger.debug("Cleaned injected script");
}
}
// Clean event attributes
if (node.attributes) {
Array.from(node.attributes).forEach((attr) => {
if (
attr.name.startsWith("on") ||
attr.name === "oncontextmenu"
) {
const cleaned = CodeNeutralizer.neutralize(attr.value);
if (
cleaned !== attr.value ||
attr.name === "oncontextmenu"
) {
node.removeAttribute(attr.name);
Logger.debug(
"Removed/cleaned event attribute:",
attr.name
);
}
}
});
}
}
});
});
}).observe(document.documentElement, {
childList: true,
subtree: true,
attributes: true,
attributeFilter: [
"onload",
"onerror",
"onclick",
"oncontextmenu",
"onkeydown",
"onkeyup",
],
});
Logger.info("DOM monitoring active");
} catch (e) {
Logger.warn("DOM monitoring failed:", e.message);
}
}
// Restore clipboard functionality
static #restoreClipboard() {
const clipboardEvents = ["copy", "cut", "paste"];
clipboardEvents.forEach((eventType) => {
document.addEventListener(
eventType,
(e) => {
// Ensure clipboard events are not blocked
e.stopImmediatePropagation();
},
true
);
});
Logger.info("Clipboard functionality restored");
}
// Prevent error handling overrides that might block DevTools
static #preventErrorOverrides() {
const originalErrorHandler = window.onerror;
window.addEventListener(
"error",
(e) => {
// Don't let websites block error reporting
e.stopImmediatePropagation();
},
true
);
// Prevent overriding of error handlers
Object.defineProperty(window, "onerror", {
set: function (handler) {
Logger.debug("Prevented error handler override");
},
get: function () {
return originalErrorHandler;
},
});
Logger.info("Error override prevention active");
}
}
// Main bypass controller
class DevToolsBypass {
static init() {
try {
Logger.info("Starting DevTools protection bypass...");
// Apply all bypasses
DevToolsProtectionBypass.apply();
// Clean existing page content
this.#cleanExistingContent();
Logger.info("DevTools bypass activated successfully");
// Show success indicator
this.#showSuccessIndicator();
} catch (e) {
Logger.warn("Bypass initialization failed:", e.message);
}
}
static #cleanExistingContent() {
try {
// Clean all existing script tags
const scripts = document.querySelectorAll("script");
scripts.forEach((script) => {
if (script.textContent) {
const cleaned = CodeNeutralizer.neutralize(script.textContent);
if (cleaned !== script.textContent) {
script.textContent = cleaned;
Logger.debug("Cleaned existing script");
}
}
});
// Remove problematic event attributes
const elementsWithEvents = document.querySelectorAll(
"[oncontextmenu], [onkeydown], [onkeyup], [onselectstart], [ondragstart]"
);
elementsWithEvents.forEach((element) => {
[
"oncontextmenu",
"onkeydown",
"onkeyup",
"onselectstart",
"ondragstart",
].forEach((attr) => {
if (element.hasAttribute(attr)) {
element.removeAttribute(attr);
Logger.debug("Removed event attribute:", attr);
}
});
});
} catch (e) {
Logger.warn("Content cleaning failed:", e.message);
}
}
static #showSuccessIndicator() {
if (!CONFIG.logging.enabled) return;
// Create a temporary success indicator
const indicator = document.createElement("div");
indicator.style.cssText = `
position: fixed;
top: 20px;
right: 20px;
background: #4CAF50;
color: white;
padding: 10px 20px;
border-radius: 5px;
z-index: 999999;
font-family: Arial, sans-serif;
font-size: 14px;
box-shadow: 0 2px 10px rgba(0,0,0,0.3);
`;
indicator.textContent = "✓ DevTools Bypass Active";
document.body?.appendChild(indicator);
// Remove after 3 seconds
setTimeout(() => {
indicator.remove();
}, 3000);
}
}
// Initialize immediately and on various events
DevToolsBypass.init();
// Also initialize when DOM is ready (fallback)
if (document.readyState === "loading") {
document.addEventListener("DOMContentLoaded", DevToolsBypass.init);
}
// Initialize on window load (another fallback)
window.addEventListener("load", DevToolsBypass.init);
})();