React - Communication

App.js

import React, { Component } from 'react';

import Switcher from './components/Switcher';
import './components/Switcher.css';


import './App.css';

class App extends Component {

  constructor(props) {
    super(props);
    this.state = { trackingStatus: true };
  }

  trackingStatusUpdate(data)
  {
      console.log(data);
  }

  render() {
    return (
      <div className="App">
        <Switcher trackingStatus={this.state.trackingStatus} trackingStatusUpdate={this.trackingStatusUpdate} />
      </div>
    );
  }
}

export default App;