bowser-normalizer.js

const bowser = require('bowser');

const FULL_SEMVER = /^(\d+)\.(\d+)\.(\d+)[\+|\-]?(.*)?$/;
const MAJOR_MINOR_VERSION = /^(\d+)\.(\d+)[\+|\-]?(.*)?$/;
const ANY_DIGIT = /^(\d+)$/;

function parseVersion(str) {
  const [, major, minor, patch, metadata] =
  FULL_SEMVER.exec(str) ||
    MAJOR_MINOR_VERSION.exec(str) ||
    ANY_DIGIT.exec(str) ||
    [];

  return {
    major,
    minor,
    patch,
    metadata,
  };
}

function getVersion(version) {
  const {
    major,
    minor
  } = parseVersion(version);
  if (major === undefined && minor === undefined) {
    return undefined;
  }
  if (minor === undefined) {
    return `${major}.0`;
  }
  return `${major}.${minor}`;
}

function getBrowserInfo(str) {
  const {
    name,
    version,
    osname,
    osversion
  } = bowser._detect(str || window.navigator.userAgent);

  return {
    browser_version: getVersion(version),
    browser_name: String(name).toLowerCase(),
    os_name: osname,
    os_version: osversion,
  };
}

const isEqual = require('lodash').isEqual;
function test(input, expected) {
  const actual = getBrowserInfo(input);
  if (isEqual(actual, expected)) {
    console.log(`[  ok]: ${JSON.stringify(actual)}`);
  } else {
    console.log(`[fail]: ${JSON.stringify(actual)} !== ${JSON.stringify(expected)}`);
  }
}

test('windows', {
  browser_version: undefined,
  browser_name: '',
  os_name: 'Windows',
  os_version: undefined
});
test(null, {
  "browser_version": "63.0",
  "browser_name": "chrome",
  "os_name": "macOS",
  "os_version": "10.11.6"
});
test('Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55 Safari/537.36', {
  "browser_version": "55.0",
  "browser_name": "chrome",
  "os_name": "macOS",
  "os_version": "10.11.6"
});