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    uainfer

    0.5.0 • Public • Published

    uainfer

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    This is a simple JavaScript library (MIT License) to infer the user agent from its claimed User-Agent string. The objective of uainfer to provide a human-friendly answer to the inquiry "What browser am I using?".

    In the context of a web browser, the most common way to obtain the User-Agent string is from the value of navigator.userAgent. In the context of an HTTP server, it can be retrieved from the User-Agent header field in the HTTP request.

    Example usage with Node.js REPL (or try it on RunKit):

    > uainfer = require('uainfer');
    > ua = uainfer.analyze('Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2)'
    > ua.toString()
    'Internet Explorer 7 on Windows XP'

    (To use this library in a front-end application, see this JSFiddle demo)

    For browsers utilizing Chrome/Blink engine (Samsung Browser, Opera, Vivaldi, etc), the result can contain the corresponding equivalent version of Chrome:

    > console.log(ua)
    UserAgent {
      browser:
       { name: 'Vivaldi',
         version: 1.96,
         fullVersion: '1.96.1147.52',
         chromeFamily: { version: 65, fullVersion: '65.0.3325.183' } },
      os: { name: 'Windows', version: '10' } }

    Non-goals:

    • Recognize every single web browsers and obscure user agents out there.
    • Deduce other information such as CPU type, device, form factor, etc.

    Design choices:

    • For a better maintenance, avoid regular expressions.
    • Always expand its small but fairly extensive test suite.
    • Keep it tidy and lightweight (4 KB when minified).

    This library is created and maintained by @AriyaHidayat.

    Keywords

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    Install

    npm i uainfer

    DownloadsWeekly Downloads

    168

    Version

    0.5.0

    License

    MIT

    Unpacked Size

    15 kB

    Total Files

    5

    Last publish

    Collaborators

    • ariya