js检测开发者工具Devtools是否打开

js检测开发者工具Devtools是否打开

var re = /x/;
console.log(re);

re.toString = function () {
  return '您打开了控制台，想查找什么呢';
};

toString() is not called on logged objects unless the console is open

参考： https://stackoverflow.com/questions/7798748/find-out-whether-chrome-console-is-open/30638226#30638226