import Parser from 'cw-user-agent'; // もしくは var Parser = require('cw-user-agent'); var parser = new Parser(); parser.setUA('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2450.0 Safari/537.36'); var info = parser.deviceInfo(); console.log( info.userAgent, info.browser, info.engine, info.os, info.device ); APIはこちらを参照。 windowにも他のライブラリにも一切依存していません。
![User agentパースするやつ作った - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/abde5bd1eb76c0335a7560fa4c49ecc67e139d03/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Fogp-background-1150d8b18a7c15795b701a55ae908f94.png%3Fixlib%3Drb-1.2.2%26w%3D1200%26mark%3Dhttps%253A%252F%252Fqiita-user-contents.imgix.net%252F~text%253Fixlib%253Drb-1.2.2%2526w%253D840%2526h%253D380%2526txt%253DUser%252520agent%2525E3%252583%252591%2525E3%252583%2525BC%2525E3%252582%2525B9%2525E3%252581%252599%2525E3%252582%25258B%2525E3%252582%252584%2525E3%252581%2525A4%2525E4%2525BD%25259C%2525E3%252581%2525A3%2525E3%252581%25259F%2526txt-color%253D%252523333%2526txt-font%253DAvenir-Black%2526txt-size%253D54%2526txt-clip%253Dellipsis%2526txt-align%253Dcenter%25252Cmiddle%2526s%253Da1f2697e25b62dff6f104c1fe96f09aa%26mark-align%3Dcenter%252Cmiddle%26blend%3Dhttps%253A%252F%252Fqiita-user-contents.imgix.net%252F~text%253Fixlib%253Drb-1.2.2%2526w%253D840%2526h%253D500%2526txt%253D%252540okunokentaro%2526txt-color%253D%252523333%2526txt-font%253DAvenir-Black%2526txt-size%253D45%2526txt-align%253Dright%25252Cbottom%2526s%253D7cb2539c08724288665f6f26fcc9b58f%26blend-align%3Dcenter%252Cmiddle%26blend-mode%3Dnormal%26s%3D1a87e11ce9ed5a335362d84dc4cb13eb)