Returns the current Location. This can be useful if you'd like to
perform some side effect whenever it changes.
import * as React from 'react'
import { useLocation } from 'react-router'
function SomeComponent() {
  let location = useLocation()
  React.useEffect(() => {
    // Google Analytics
    ga('send', 'pageview')
  }, [location]);
  return (
    // ...
  );
}
function useLocation(): Location
The current Location object