apalmer0

class City extends Component {
  state = {
    active: false,
  }

  handleClick = () => (
    this.setState({
      active: !this.state.active,
    })
  )

apalmer0

class CityList extends Component {
  state = {
    cities: [
      {
        id: 1,
        name: 'Boston',
      },
      {
        id: 2,
        name: 'Cambridge',