function.js

import {browserHistory} from 'react-router';

export function getValueFromUrl(input) {
  const [pathname, prop] = input.split('.');

  const currentLocation = browserHistory.getCurrentLocation();

  if (currentLocation.pathname !== `/${pathname}`) {
    return null;
  }

  const targetProp = currentLocation.query[prop];

  return targetProp === undefined ? null : targetProp;
}