Allow to open Dev Tools on some website.
// ==UserScript==
// @name Allow F12
// @name:zh-CN 允许使用 F12
// @namespace http://lab.wsl.moe/
// @match http://*/*
// @match https://*/*
// @license MIT
// @version 0.3.4
// @description Allow to open Dev Tools on some website.
// @description:zh-CN 令某些打开 Developer Tools 的网站就弹 debugger 的功能失效。
// @author MisakaMikoto
// @run-at document-start
// @grant none
// ==/UserScript==
(function() {
const origSetInterval = window.setInterval;
const toString = () => {
return 'function constructor() {\n [native code]\n}';
};
toString.toString = toString;
if (toString.toSource) {
toString.toSource = toString;
}
window.setInterval = (func, time) => {
if (func.toString().indexOf('debugger') !== -1) {
console.warn('Rejected to register a interval contains debugger statement.');
return;
}
origSetInterval(func, time);
};
window.setInterval.toString = toString;
const origFunction = Function;
class FakeFunction extends origFunction {
constructor(func) {
if (!func) {
super(func);
return;
}
if (func.indexOf && func.indexOf('debugger') !== -1) {
//console.warn('Rejected to generate a function contains debugger statement.');
func = '';
}
super(func);
}
}
FakeFunction.constructor = (func) => {
return new FakeFunction(func);
};
window.Function = FakeFunction;
Function.constructor.toString = toString;
if (Function.constructor.toSource) {
Function.constructor.toSource = toString;
}
if (localStorage.__disableEvalHook__ == null || localStorage.__disableEvalHook__ === '') {
localStorage.__disableEvalHook__ = 'true';
}
if (Object && Object.defineProperty) {
const originalConsole = {};
const noWriteAbleConsole = {};
for (let k in console) {
let func = console[k];
originalConsole[k] = func;
}
for (let k in originalConsole) {
const origFunc = originalConsole[k];
let func = origFunc;
switch (k) {
case 'clear':
func = () => {};
break;
case 'log':
case 'info':
case 'warn':
case 'error':
func = (...args) => {
const nativeToString = ([]).toString;
for (let i of args) {
const rawToString = i.toString;
rawToString.toString = nativeToString;
const targetSourceCode = rawToString.toString();
if (targetSourceCode.startsWith('function') && targetSourceCode.indexOf('[native code]') === -1) {
console.warn('Some script mabe trying to disable F12 console.');
return;
}
}
const executeResult = origFunc.apply(this, args);
originalConsole.groupCollapsed('trace for upper log');
originalConsole.debug('agrs: ', args);
originalConsole.trace(args[0]);
originalConsole.groupEnd();
return executeResult;
};
break;
}
Object.defineProperty(noWriteAbleConsole, k, {
get: () => { return func },
set: (val) => {
originalConsole.warn('Some script trying to change console function:');
originalConsole.warn(val);
return val;
}
});
}
Object.defineProperty(window, 'console', {
get: () => { return noWriteAbleConsole },
set: (val) => {
originalConsole.warn('Some script trying to change console object:');
originalConsole.warn(val);
return val;
}
});
const realWindowEval = window.eval;
if (localStorage.__disableEvalHook__ !== 'true') {
window.eval = (func) => {
if (func.indexOf('debugger') !== -1) {
func = func.replace(/debugger?/, 'throw null');
}
console.log(func);
const localEval = realWindowEval;
const result = localEval.apply(this, [func]);
return result;
};
}
const origDefineProperty = Object.defineProperty;
Object.defineProperty = (obj, k, opt) => {
if (obj === window && k === 'console') {
originalConsole.warn('Some script trying to change console object:');
originalConsole.warn(opt);
return;
}
const result = origDefineProperty(obj, k, opt);
return result;
};
const origDefineProperties = Object.defineProperties;
Object.defineProperties = (obj, opt) => {
if (obj === window) {
if (opt.console != null) {
delete opt['console'];
originalConsole.warn('Some script trying to change console object:');
originalConsole.warn(opt);
}
}
const result = origDefineProperties(obj, opt);
return result;
};
} else {
const originalConsole = {};
for (let k in console) {
let func = console[k];
if (k === 'clear') {
func = () => {};
}
originalConsole[k] = func;
}
const setConsoleFunc = () => {
for (let k in originalConsole) {
console[k] = originalConsole[k];
}
}
setInterval(() => {
setConsoleFunc();
}, 1000);
}
})();