dranes/gist:38fb289befc28de88f33b1ac08df3de6

## gistfile1.txt
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Hello World</title>
    <script src="https://unpkg.com/react@16/umd/react.development.js"></script>
    <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>

    <!-- Don't use this in production: -->
    <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
  </head>
  <body>
    <div id="root"></div>
    <script type="text/babel">
      class Clock extends React.Component {
        constructor(props) {
            super(props);
            this.state = {
                date: new Date(),
                counter: 1,
                comments: [
                    {id: 0, text: 'Hola'},
                    {id: 1, text: 'Hello'},
                    {id: 2, text: 'Chao'},
                    {id: 3, text: 'Bye'},
                ]
            }
        }

        render() {
            return (
                <div>
                    <h1>Time is</h1>
                    <h2>{this.state.date.toLocaleTimeString()}</h2>
                    <h3>Incrementing: {this.state.counter}</h3>

                    <h3>Comments Section:</h3>
                    <ul>
                        {this.state.comments.map(comment => {
                            return <li key={comment.id}>{comment.text} <a href="#" onClick={this.removeComment.bind(this, comment)}>remove</a></li>;
                        })}
                    </ul>
                </div>
            );
        }

        tick() {

            this.setState((state, props) => ({
                date: new Date(),
                counter: state.counter + 1
            }));
        }

        removeComment = (comment, e) => {
            e.preventDefault();
            console.log("click", comment.id);

            const comments = this.state.comments;
            comments.splice(comments.indexOf(comment), 1);
            this.setState({comments});

        }

        componentDidMount() {
            this.timerID = setInterval(
                () => this.tick(),
                1000
            );
        }

        componentWillUnmount() {
            clearInterval(this.timerID);
        }
      }

      ReactDOM.render(
        <Clock/>,
        document.getElementById('root')
      );

    </script>
    <!--
      Note: this page is a great way to try React but it's not suitable for production.
      It slowly compiles JSX with Babel in the browser and uses a large development build of React.

      Read this section for a production-ready setup with JSX:
      https://reactjs.org/docs/add-react-to-a-website.html#add-jsx-to-a-project

      In a larger project, you can use an integrated toolchain that includes JSX instead:
      https://reactjs.org/docs/create-a-new-react-app.html

      You can also use React without JSX, in which case you can remove Babel:
      https://reactjs.org/docs/react-without-jsx.html
    -->
  </body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8" />
	<title>Hello World</title>
	<script src="https://unpkg.com/react@16/umd/react.development.js"></script>
	<script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>

	<!-- Don't use this in production: -->
	<script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
	</head>
	<body>
	<div id="root"></div>
	<script type="text/babel">
	class Clock extends React.Component {
	constructor(props) {
	super(props);
	this.state = {
	date: new Date(),
	counter: 1,
	comments: [
	{id: 0, text: 'Hola'},
	{id: 1, text: 'Hello'},
	{id: 2, text: 'Chao'},
	{id: 3, text: 'Bye'},
	]
	}
	}

	render() {
	return (
	<div>
	<h1>Time is</h1>
	<h2>{this.state.date.toLocaleTimeString()}</h2>
	<h3>Incrementing: {this.state.counter}</h3>

	<h3>Comments Section:</h3>
	<ul>
	{this.state.comments.map(comment => {
	return <li key={comment.id}>{comment.text} <a href="#" onClick={this.removeComment.bind(this, comment)}>remove</a></li>;
	})}
	</ul>
	</div>
	);
	}

	tick() {

	this.setState((state, props) => ({
	date: new Date(),
	counter: state.counter + 1
	}));
	}

	removeComment = (comment, e) => {
	e.preventDefault();
	console.log("click", comment.id);

	const comments = this.state.comments;
	comments.splice(comments.indexOf(comment), 1);
	this.setState({comments});

	}

	componentDidMount() {
	this.timerID = setInterval(
	() => this.tick(),
	1000
	);
	}

	componentWillUnmount() {
	clearInterval(this.timerID);
	}
	}

	ReactDOM.render(
	<Clock/>,
	document.getElementById('root')
	);

	</script>
	<!--
	Note: this page is a great way to try React but it's not suitable for production.
	It slowly compiles JSX with Babel in the browser and uses a large development build of React.

	Read this section for a production-ready setup with JSX:
	https://reactjs.org/docs/add-react-to-a-website.html#add-jsx-to-a-project

	In a larger project, you can use an integrated toolchain that includes JSX instead:
	https://reactjs.org/docs/create-a-new-react-app.html

	You can also use React without JSX, in which case you can remove Babel:
	https://reactjs.org/docs/react-without-jsx.html
	-->
	</body>
	</html>