[Solved]-React router: how to pass param from URL into component?-Reactjs

fixed it-

    <route path='/contacts/:name' render={(props) => (
      <div>hello, { props.match.params.name } </div>
    )} />

it would be part of the match object that gets passed in as props.

<route path='/contacts/:name' render={({ match }) => (
    <div>hello, { match.params.name } </div>
)} />