如何在javascript中检索用户代理值（未定义代理）？

Question

我想从标题中检索用户代理值，但是当我运行我的代码时，它显示未定义代理，这似乎程序无法识别“-”。

Answer 1

As I'm using flow.json in Node Red, I am unable to access this.window. For my solution, for example if I want to get user-agent, instead of msg.req.headers.user-agent I use msg.req.headers['user-agent'].

Answer 2

Use the navigator object

eg: below:

navigator.userAgent;

See the Ref. userAgent

Answer 3

您可以使用

var userAgent = window.navigator.userAgent;