gaearon/index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Add React in One Minute</title>
  </head>
  <body>

    <h2>Add React in One Minute</h2>
    <p>This page demonstrates using React with no build tooling.</p>
    <p>React is loaded as a script tag.</p>

    <!-- We will put our React component inside this div. -->
    <div id="like_button_container"></div>

    <!-- Load React. -->
    <!-- Note: when deploying, replace "development.js" with "production.min.js". -->
    <script src="https://unpkg.com/react@17/umd/react.development.js" crossorigin></script>
    <script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js" crossorigin></script>

    <!-- Load our React component. -->
    <script src="like_button.js"></script>

  </body>
</html>

## like_button.js
'use strict';

const e = React.createElement;

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

  render() {
    if (this.state.liked) {
      return 'You liked this.';
    }

    return e(
      'button',
      { onClick: () => this.setState({ liked: true }) },
      'Like'
    );
  }
}

const domContainer = document.querySelector('#like_button_container');
ReactDOM.render(e(LikeButton), domContainer);
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8" />
	<title>Add React in One Minute</title>
	</head>
	<body>

	<h2>Add React in One Minute</h2>
	<p>This page demonstrates using React with no build tooling.</p>
	<p>React is loaded as a script tag.</p>

	<!-- We will put our React component inside this div. -->
	<div id="like_button_container"></div>

	<!-- Load React. -->
	<!-- Note: when deploying, replace "development.js" with "production.min.js". -->
	<script src="https://unpkg.com/react@17/umd/react.development.js" crossorigin></script>
	<script src="https://unpkg.com/react-dom@17/umd/react-dom.development.js" crossorigin></script>

	<!-- Load our React component. -->
	<script src="like_button.js"></script>

	</body>
	</html>
	'use strict';

	const e = React.createElement;

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

	render() {
	if (this.state.liked) {
	return 'You liked this.';
	}

	return e(
	'button',
	{ onClick: () => this.setState({ liked: true }) },
	'Like'
	);
	}
	}

	const domContainer = document.querySelector('#like_button_container');
	ReactDOM.render(e(LikeButton), domContainer);