Untitled

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="https://unpkg.com/react@16.0.0/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@16.0.0/umd/react-dom.development.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.34/browser.min.js"></script>
    <style>
        div {
            border-style: dotted;
            width: 300px;
        }

        #one {
            left: 150px;
        }
    </style>
</head>

<body>
    <div id="react-app">
    </div>
    <script  type="text/babel">
        class Main extends React.Component {
            constructor() {
                super();
                this.state = {
                    foodlist: ["masło", "mleko", "chleb", "dżem"],
                    food: ""
                };
                this.onButtonClick = this.onButtonClick.bind(this)
            }
            onButtonClick() {
                var jedzenie = this.state.foodlist[Math.floor(Math.random() * this.state.foodlist.length)]
                console.log(jedzenie)
                this.setState({
                    food: jedzenie
                })
            }
            render() {
                return (
                    <div>
                        <button onClick={this.onButtonClick}>Klik</button>
                        <One food={this.state.food}/>
                        <One food={this.state.food}/>
                        <One food={this.state.food}/>
                    </div>
                );
            }
        }

        class One extends React.Component {
            constructor(props) {
                super(props);
            }
            render() {
                return (
                    <div>
                        <div>{this.props.food}</div>
                    </div>
                );
            }
        }

        ReactDOM.render
            (
            <Main />,
            document.getElementById('react-app')
            )

    </script>
</body>

</html>