How to retrieve user-agent value in javascript (Agent is not defined)?

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I would like to retrieve the user-agent value from header but when I run my code it shows agent is not defined, which seems like the program is not able to recognise the '-'.

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'].

NavigatorID.userAgent, userAgent read-only property returns the user agent string for the current browser . Never assume that the value of this property will stay the same in future Try not to use it at all, or only for current and past versions of a browser. sent, and doesn't affect browser detection performed by JavaScript code. I'd like to get a script that can grab the user's user agent and prop it to an attribute. I'm making a website problems contact form and I usually need to know what browser the user is using. How can I detect the user agent string and prop it as the value of an input element.

Use the navigator object

e.g: below:

navigator.userAgent;

See the Ref. userAgent

`user-agent` header control � Issue #37 � whatwg/fetch � GitHub, Should fetch() set user-agent by default? to tell what User-Agent header gets sent then (currently)? E.g. const r r.headers.get("User-Agent") will return undefined ? userAgent is an option that is undefined, null, or a header value. `user-agent` in `Access-Control-Allow-Headers` octokit/rest.js#817. JavaScript how to check User Agent for Mobile/Tablet. Ask Question Asked 6 years, 5 months ago. Active 1 year, 1 month ago. Viewed 87k times 18. 8. I'm currently

You can use

var userAgent = window.navigator.userAgent;

Default `window.navigator.userAgent` value is `undefined` � Issue , Using jsdom@7.2.2 I get the following error from modules using navigator. userAgent: Cannot read property 'indexOf' of undefined According to the userAgent : the user agent string used in requests; defaults to Node.js� Settings Getter for userAgent Value window. navigator.__defineGetter__(' userAgent', function { return ' __USER__AGENT_DEMO___'; }); You can set a breakpoint in the function that you've passed as second parameter, and you'll see that you'll hit it as you access the property. After you set your getters, check it out in your console:

Improving user privacy and developer experience with User-Agent , User-Agent Client Hints are a new expansion to the Client Hints API, that HTTP /1.0), where you can find the original definition for the User-Agent string, which Privacy and compatibility considerations mean the value may be blank, not the User-Agent can also be accessed in JavaScript via navigator. The User-Agent request header is a characteristic string that lets servers and network peers identify the application, operating system, vendor, and/or version of the requesting user agent.

Navigator userAgent Property, of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML. Definition and Usage. The userAgent property returns the value of the user-agent header sent by the browser to the server. The value returned, contains information about the name, version and platform of the browser. Get Certified �� Safari and iCab allow users to change the browser user agent string to predefined Internet Explorer or Netscape strings via a menu. Syntax var ua = navigator.userAgent; Value. A DOMString specifying the complete user agent string the browser provides both in HTTP headers and in response to this and other related methods on the Navigator object.

HTTP headers, Your browser sends the user agent to every website you connect to. There is no conventional way of writing a user agent string as different browsers use� Request headers (like Accept, Content-Type, User-Agent, Referer, etc.) are an essential part of any HTTP request. The Fetch API's Headers object allows us to set, remove, or retrieve HTTP request headers. We can create a header object using the Headers() constructor and then use the append, has, get, set, and delete methods to modify request

Comments
  • There is no navigator object available on the server side in Node-RED.
  • There is no window object available on the server side in Node-RED.