Very simple, no deps user agent string parser.
Parse user agents a bit like PHP's get_browser(). Rudimentary but it works.
const userAgent = require('user-agent-parse');
userAgent.parse('Mozilla/5.0 (Windows; U; Windows NT 5.1; en) AppleWebKit/526.9 (KHTML, like Gecko) Version/4.0dp1 Safari/526.8');
// => { name: 'safari', version: '4.0dp1', os: 'Windows XP', full: '... same string as above ...', device_type:'desktop' }
See /test/test.js
for a simple suite
Heavily based on (blatantly ripped from ahem) https://github.com/soldair/node-ua-device-type and https://github.com/jujhars13/node-user-agent-parse
License is MIT, go nuts.