example.js

const DanielasAwesomePage = (props) => {
  const {activeTab, otherOption} = props
  return <div className="DanielasAwesomeMap">
    ...
  </div>
}

const PageA = (props) => (
  <DanielasAwesomePage
    activeTab="TabA"
    otherOptions={...}
  />
)


const PageB = (props) => {
  <DanielasAwesomePage
    activeTab="TabB"
    otherOptions={...}
  />
}
// you can even wrap PageA and PageB in different redux connections

const NotFoundErrorPage = () => (
  <div><h1>Error Page Not Found</h1></div>
)

const App = () => (
  <Router history={browserHistory}>
    <Route path="/pageA" component={PageA}/>
    <Route path="/pageB" component={PageB}/>
    <Route path="/*" component={NotFoundErrorPage}/>
  </Router>
)