index.js

'use strict'

module.exports = isMobile
module.exports.isMobile = isMobile
module.exports.default = isMobile

const mobileRE = /(android|bb\d+|meego).+mobile|armv7l|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series[46]0|samsungbrowser.*mobile|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i
https://github.com/juliangruber/is-mobile/blob/main/const notMobileRE = /CrOS/

const tabletRE = /android|ipad|playbook|silk/i

function isMobile (opts) {
  if (!opts) opts = {}
  let ua = opts.ua
  if (!ua && typeof navigator !== 'undefined') ua = navigator.userAgent
  if (ua && ua.headers && typeof ua.headers['user-agent'] === 'string') {
    ua = ua.headers['user-agent']
  }
  if (typeof ua !== 'string') return false

  let result =
    (mobileRE.test(ua) && !notMobileRE.test(ua)) ||
    (!!opts.tablet && tabletRE.test(ua))

  if (
    !result &&
    opts.tablet &&
    opts.featureDetect &&
    navigator &&
    navigator.maxTouchPoints > 1 &&
    ua.indexOf('Macintosh') !== -1 &&
    ua.indexOf('Safari') !== -1
  ) {
    result = true
  }

  return result
}