Detect user-agent, operating system, browser, and device using several libraries, including ua-parser, ua-parser-js, and platform. According to useragent v2.2.1

In computing, a user agent is any software, acting on behalf of a user, which "retrieves, renders and facilitates end-user interaction with Web content."

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.

The User-Agents.Net website provides various user agent lists and technical information about them.

Understand what information is contained in a YandexBot user agent string. Get an analysis of your or any other user agent string. Find lists of user agent strings from browsers, crawlers, spiders, bots...

random-useragent-string-1.

Description. User agents are used throughout client-server computing and application user agents that request web-based content are commonly browsers and search engine bots. Newsreaders, screen...

Detect user-agent, IP address, operating system, browser, and much more using our User Agent tool.

<?php $useragent = $_SERVER ['HTTP_USER_AGENT']; echo "Your <b>User Agent is</b Why does Internet Explorer (9) report "Mozilla" in UserAgent? 7935. Why does HTML think "chucknorris" is...

[normal] navigator.userAgent : This method reads the navigator object when the page load is finished. This is the most common method to detect the user's actual user-agent string.

How does User-Agent parsing work in device detection? From a technical point of view examining the User-Agent is not difficult. You can get a User-Agent string using navigator.userAgent in JavaScript...

Reference information about the user agent string that Chrome sends in Android, iOS, and WebView contexts. It's also available in the client through JavaScript using the navigator.userAgent call.