rith-print-js-updated/src/js/browser.js

A tiny javascript library to help printing from the web.

const Browser = {
  // Firefox 1.0+
  isFirefox: () => {
    return typeof InstallTrigger !== 'undefined'
  },
  getFirefoxMajorVersion: (userAgent) => {
    userAgent = userAgent || navigator.userAgent
    const firefoxVersionRegex = /firefox\/(\S+)/
    const match = userAgent.toLowerCase().match(firefoxVersionRegex)
    if (match) {
      return match[1].split('.').map(x => parseInt(x))[0]
    }
  },
  // Internet Explorer 6-11
  isIE: () => {
    return navigator.userAgent.indexOf('MSIE') !== -1 || !!document.documentMode
  },
  // Edge 20+
  isEdge: () => {
    return !Browser.isIE() && !!window.StyleMedia
  },
  // Chrome 1+
  isChrome: (context = window) => {
    return !!context.chrome
  },
  // At least Safari 3+: "[object HTMLElementConstructor]"
  isSafari: () => {
    return Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0 ||
        navigator.userAgent.toLowerCase().indexOf('safari') !== -1
  },
  // IOS Chrome
  isIOSChrome: () => {
    return navigator.userAgent.toLowerCase().indexOf('crios') !== -1
  }
}

export default Browser