index.jsx

import React from 'react';

export default class TodoBox extends React.Component {
    render() {
        return (
            <div className="todoBox">
                <h1>Todos</h1>
                <TodoList />
                <TodoForm />
            </div>
        );
    }
}

class TodoList extends React.Component {
    render() {
        return (
            <div className="todoList">
              <table style={{border: "2px solid black"}}>
                <tbody>
                  <Todo title="Shopping">Milk</Todo>
                  <Todo title="Hair cut">13:00</Todo>
                  <Todo title="Learn React">15:00</Todo>
                </tbody>
              </table>
            </div>
        );
    }
}

class Todo extends React.Component {
    constructor(props) {
        super(props);
        this.state = {checked: false};
    }

    handleChange(e) {
        this.setState({checked: e.target.checked});
    }

    render() {
        return (
            <tr>
                <td style={{border: "1px solid black"}}>
                    <input type="checkbox" checked={this.state.checked} onChange={this.handleChange}/>
                </td>
                <td style={{border: "1px solid black"}}>{this.props.title}</td>
                <td style={{border: "1px solid black"}}>{this.props.children}</td>
            </tr>
        );
    }
}
Todo.propTypes = {
    title: React.PropTypes.string.isRequired
};

class TodoForm extends React.Component {
    render() {
        return (
            <div className="todoForm">
                I am a TodoForm.
            </div>
        );
    }
}