react-router/modules/utils/supportsHistory.js

A complete routing library for React.js

function supportsHistory() {
  /*! taken from modernizr
   * https://github.com/Modernizr/Modernizr/blob/master/LICENSE
   * https://github.com/Modernizr/Modernizr/blob/master/feature-detects/history.js
   */
  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) {
    return false;
  }
  return (window.history && 'pushState' in window.history);
}

module.exports = supportsHistory;