在任何人开始说这不可能之前，请导航至facebook.com，即使在非连接模式下也要打开devtools，它会告诉您dev工具已打开，对吗？
那么，Facebook如何实现这一目标呢？
我可以在连接的窗户上做
window.outerHeight - window.innerHeight > 200 || window.outerWidth - window.innerWidth > 200
但是，当窗口弹出时，这是行不通的。
Facebook如何做到这一点？
最佳答案
正如注释中的@ elpddev推测的那样，他们仅在页面加载时使用console.log记录日志，他们没有检测到您已打开控制台。
如果检查页面上的JS代码，则应该找到以下内容：
var j = i.stop || h._("Stop!")
, k = i.text || h._("This is a browser feature intended for developers. If someone told you to copy-paste something here to enable a Facebook feature or \"hack\" someone's account, it is a scam and will give them access to your Facebook account.")
, l = i.more || h._("See {url} for more information.", [h.param('url', 'https://www.facebook.com/selfxss')]);
if ((window.chrome || window.safari) && !i.textonly) {
var m = 'font-family:helvetica; font-size:20px; ';
[[j, i.c1 || m + 'font-size:50px; font-weight:bold; ' + 'color:red; -webkit-text-stroke:1px black;'], [k, i.c2 || m], [l, i.c3 || m], ['', '']].map(function(s) {
setTimeout(console.log.bind(console, '\n%c' + s[0], s[1]));
});
} else {
var n = ['', ' .d8888b. 888 888', 'd88P Y88b 888 888', 'Y88b. 888 888', ' "Y888b. 888888 .d88b. 88888b. 888', ' "Y88b. 888 d88""88b 888 "88b 888', ' "888 888 888 888 888 888 Y8P', 'Y88b d88P Y88b. Y88..88P 888 d88P', ' "Y8888P" "Y888 "Y88P" 88888P" 888', ' 888', ' 888', ' 888']
, o = ('' + k).match(/.{35}.+?\s+|.+$/g)
, p = Math.floor(Math.max(0, (n.length - o.length) / 2));
for (var q = 0; q < n.length || q < o.length; q++) {
var r = n[q];
n[q] = r + new Array(45 - r.length).join(' ') + (o[q - p] || '');
}
console.log('\n\n\n' + n.join('\n') + '\n\n' + l + '\n');
return;
}
由于它被缩小了，即使印刷精美，也有点难以阅读。
j = i.stop || h._("Stop!")类型的东西似乎正在尝试加载本地化的文本，回落为英语。然后，它进行测试以查看他们是否已将浏览器检测为Chrome或Safari，并且未设置i.textonly，如果设置为else，则该浏览器似乎以您在Chrome / Safari中浏览时获得的精美样式显示。 子句很难遵循，但它似乎会创建您在文本模式或非Chrome / Safari浏览器中获得的ASCII艺术标语： .d8888b. 888 888
d88P Y88b 888 888
Y88b. 888 888 This is a browser feature intended for
"Y888b. 888888 .d88b. 88888b. 888 developers. If someone told you to copy-paste
"Y88b. 888 d88""88b 888 "88b 888 something here to enable a Facebook feature
"888 888 888 888 888 888 Y8P or "hack" someone's account, it is a
Y88b d88P Y88b. Y88..88P 888 d88P scam and will give them access to your
"Y8888P" "Y888 "Y88P" 88888P" 888 Facebook account.
888
888
888
See https://www.facebook.com/selfxss for more information.