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HTML

              
                <div id='root'></div>
              
            
!

CSS

              
                
              
            
!

JS

              
                // For this demo, we are using the UMD build of react-router-dom
const {
  BrowserRouter,
  Switch,
  Route,
  Link
} = ReactRouterDOM

const {
  Component,
} = React;

const Router = BrowserRouter;

const Step1View = () => (
  <div>
    <h1> Step 1</h1>
  </div>
)

const Step2View = () => (
  <div>
    <h1> Step 2</h1>
  </div>
)

class Home extends Component {
  constructor(props) {
    super(props);
    console.log('-!!!')
    this.state = {
      step: 1,
    }
    this.next = this.next.bind(this);
  }
  
  next(stepNumber=1) {
    this.props.history.push({
      pathname: `/${stepNumber}`,
    }); 
    
    
    // this.props.history.push({
    //   pathname: `/adamchenwei/pen/YeJBxY?editors=0011/?step=${stepNumber}`,
    // });
    // const query = this.props.history.location.pathname;
    // console.log('---aaaaa');
    // console.log(query);
    // if (query === '/adamchenwei/pen/YeJBxY?editors=0011/?step=1') {
    //   this.setState({
    //     step: 1,
    //   })
    // } else if (query === '/adamchenwei/pen/YeJBxY?editors=0011/?step=2') {
    //   this.setState({
    //     step: 2,
    //   })
    // }
    // console.log('current step');
    // console.log(this.state.step);
  }
  render() {
    console.log('render!!!');
    console.log(this);
    console.log(this.props.match.params);
    const {
      step
    } = this.state;
    console.log('---step');
    console.log(step);
    return(
      <div>
        <h1>Welcome to the Tornadoes Website!</h1>
        <button onClick={()=> this.next(1)} > Step 1</button>
        <button onClick={()=> this.next(2)} > Step 2</button>
        {
          this.props.match.params === 1 ? <h1>Step 1 here</h1> : null
        }
        {
          this.props.match.params === 2 ? <h1>Step 2 here</h1> : null
        }
      </div>

    );
  }
}

// The Main component renders one of the three provided
// Routes (provided that one matches). Both the /roster
// and /schedule routes will match any pathname that starts
// with /roster or /schedule. The / route will only match
// when the pathname is exactly the string "/"
const Main = () => (
  <main>
    <Route exact path='/:step' component={Home}/>
  </main>
)

// The Header creates links that can be used to navigate
// between routes.
const Header = () => (
  <header>
    <nav>
      <ul>
        <li><Link to='/1'>Home</Link></li>
      </ul>
    </nav>
  </header>
)

const App = () => (
  <div>
    <Header />
    <Main />
  </div>
)

// This demo uses a HashRouter instead of BrowserRouter
// because there is no server to match URLs
ReactDOM.render((
  <Router>
    <App />
  </Router>
), document.getElementById('root'))

              
            
!
999px

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