利用Javascript检测开发者工具Devtools是否打开
function checkDevTools(options) { const isFF = ~navigator.userAgent.indexOf("Firefox"); let toTest = ''; if (isFF) { toTest = /./; toTest.toString = function() { options.opened(); } } else { toTest = new Image(); toTest.__defineGetter__('id', function() { options.opened(); }); } setInterval(function() { options.offed(); console.log(toTest); console.clear && console.clear(); }, 1000); } checkDevTools({ opened: function() { document.body.innerHTML = 'Dev Tools is on'; }, offed: function() { document.body.innerHTML = 'Dev Tools is off'; } });
通过此代码可以监听到是否打开开发者调试窗口。如果打开那么可以移除一些敏感信息,或者防爬虫设定。
后续,又有一种兼容性较好的版本
setInterval(function() { check() }, 4000); var check = function() { function doCheck(a) { if (("" + a / a)["length"] !== 1 || a % 20 === 0) { (function() {} ["constructor"]("debugger")()) } else { (function() {} ["constructor"]("debugger")()) } doCheck(++a) } try { doCheck(0) } catch (err) {} }; check();
let num = 0; const devtools = new Date(); devtools.toString = function () { num++; if (num > 1) { console.log('Console is opened'); window.location.href = "http://www.baidu.com"; } }; console.log(devtools);