twister-react/node_modules/react-router/lib/supportsHistory.js

'use strict';

function supportsHistory() {
  /*! taken from modernizr
   * https://github.com/Modernizr/Modernizr/blob/master/LICENSE
   * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
   * changed to avoid false negatives for Windows Phones: https://github.com/rackt/react-router/issues/586
   */
  var ua = navigator.userAgent;
  if ((ua.indexOf('Android 2.') !== -1 || ua.indexOf('Android 4.0') !== -1) && ua.indexOf('Mobile Safari') !== -1 && ua.indexOf('Chrome') === -1 && ua.indexOf('Windows Phone') === -1) {
    return false;
  }
  return window.history && 'pushState' in window.history;
}

module.exports = supportsHistory;