User Agent normaliser

This is the JavaScript implementation of the User-Agent normalisation used within the polyfill-library.

Usage

For a request which was the user-agent Chrome 71.1:

Example

const UA = require('@mrhenry/polyfill-useragent-normaliser');

const useragent = new UA(request.headers['user-agent']);
console.log(useragent.isUnknown()); // false
console.log(useragent.satisfies("<50")); // false
console.log(useragent.satisfies(">50")); // true