How to use the bowser.mobile function in bowser

debug = require('debug')('rtcninja:Adapter'),
	debugerror = require('debug')('rtcninja:ERROR:Adapter'),

	// Internal vars
	getUserMedia = null,
	mediaDevices = null,
	RTCPeerConnection = null,
	RTCSessionDescription = null,
	RTCIceCandidate = null,
	MediaStreamTrack = null,
	getMediaDevices = null,
	attachMediaStream = null,
	canRenegotiate = false,
	oldSpecRTCOfferOptions = false,
	browserVersion = Number(browser.version) || 0,
	isDesktop = !!(!browser.mobile && (!browser.tablet || (browser.msie && browserVersion >= 10))),
	hasWebRTC = false,
	// Dirty trick to get this library working in a Node-webkit env with browserified libs
	virtGlobal = global.window || global,
	// Don't fail in Node
	virtNavigator = virtGlobal.navigator || {};

debugerror.log = console.warn.bind(console);


// Constructor.

function Adapter(options) {
	// Chrome desktop, Chrome Android, Opera desktop, Opera Android, Android native browser
	// or generic Webkit browser.
	if (
		(isDesktop && browser.chrome && browserVersion >= 32) ||

// Dependencies.

var browser = require('bowser'),
	debug = require('debug')('rtcninja'),
	debugerror = require('debug')('rtcninja:ERROR'),
	version = require('./version'),
	Adapter = require('./Adapter'),
	RTCPeerConnection = require('./RTCPeerConnection'),

	// Internal vars.
	called = false;

debugerror.log = console.warn.bind(console);
debug('version %s', version);
debug('detected browser: %s %s [mobile:%s, tablet:%s, android:%s, ios:%s]',
		browser.name, browser.version, !!browser.mobile, !!browser.tablet,
		!!browser.android, !!browser.ios);


// Constructor.

function rtcninja(options) {
	// Load adapter
	var iface = Adapter(options || {});  // jshint ignore:line

	called = true;

	// Expose RTCPeerConnection class.
	rtcninja.RTCPeerConnection = RTCPeerConnection;

	// Expose WebRTC API and utils.
	rtcninja.getUserMedia = iface.getUserMedia;

// Dependencies.

var browser = require('bowser'),
	debug = require('debug')('rtcninja'),
	debugerror = require('debug')('rtcninja:ERROR'),
	version = require('./version'),
	Adapter = require('./Adapter'),
	RTCPeerConnection = require('./RTCPeerConnection'),

	// Internal vars.
	called = false;

debugerror.log = console.warn.bind(console);
debug('version %s', version);
debug('detected browser: %s %s [mobile:%s, tablet:%s, android:%s, ios:%s]',
		browser.name, browser.version, !!browser.mobile, !!browser.tablet,
		!!browser.android, !!browser.ios);


// Constructor.

function rtcninja(options) {
	// Load adapter
	var iface = Adapter(options || {});  // jshint ignore:line

	called = true;

	// Expose RTCPeerConnection class.
	rtcninja.RTCPeerConnection = RTCPeerConnection;

	// Expose WebRTC API and utils.
	rtcninja.getUserMedia = iface.getUserMedia;

function create_fixed_footer_placement() {
    var element_id = 'rtd-' + (Math.random() + 1).toString(36).substring(4);
    var display_type = constants.PROMO_TYPES.FIXED_FOOTER;

    // Only propose the fixed footer ad for mobile
    if (bowser && bowser.mobile) {
        $('<div>').attr('id', element_id).appendTo('body');
        return {
            'div_id': element_id,
            'display_type': display_type,

            // Prioritize mobile ads when on mobile
            'priority': constants.MAXIMUM_PROMO_PRIORITY,
        };
    }

    return null;
}
</div>

// if we have an error, just render the error component
    if (localStream.error) {
      return (
        <div style="{[styles.css]}">
          
        </div>
      );
    }

    let overlayComponent;
    if (!~['connected', 'joining'].indexOf(this.state.status)) {
      if (Browser.mobile || Browser.tablet || this.state.status === 'connecting') {
        overlayComponent = (
          
        );
      } else if (this.state.status !== 'connecting' &amp;&amp; !localStream.loading) {
        overlayComponent = (
          
        );
      }
    }

export const loginWithGoogle = () => (dispatch, getState) => {
  dispatch({
    type: constants.LOGIN_WITH_GOOGLE,
  });

  Meteor.loginWithGoogle({
    requestPermissions: GOOGLE_PERMISSIONS,
    loginStyle: (Browser.mobile || Browser.tablet) ? 'redirect' : 'popup',
    requestOfflineToken: true,
    forceApprovalPrompt: true,
  }, (error) => {
    if (error) {
      return dispatch({
        type: constants.LOGIN_ERROR,
        error,
      });
    }
  });
};

OneSignal.isOptedOut().then(isOptedOut => {
            if (!isOptedOut) {
             /*
              * Chrome 63 on Android permission prompts are permanent without a dismiss option. To avoid
              * permanent blocks, we want to replace sites automatically showing the native browser request
              * with a slide prompt first.
              */
              if (
                (
                  !options ||
                  options && !options.fromRegisterFor
                ) &&
                Browser.chrome &&
                Number(Browser.version) >= 63 &&
                (Browser.tablet || Browser.mobile)
                ) {
                OneSignal.showHttpPrompt();
              } else {
               SubscriptionHelper.registerForPush();
              }
            } else {
              OneSignal._sessionInitAlreadyRunning = false;
            }
          });
        }