intext:reach router dynamic path using map
// URL: /user/napoleon/grades
const App = () => (
<Router>
<User path="user/:userId">
<Grades path="grades" />
</User>
</Router>
)
const User = props => (
// props.uri === "/user/napoleon"
<div>{props.children}</div>
)
const Grades = props => (
// props.uri === "/user/napoleon/grades"
<div>...</div>
)