react-examples/pure-component.htm at master · arvindpdmn/react-examples · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>React Pure Component</title>
</head>

<body>
    <div id="root"></div>

    <script src="https://unpkg.com/react@15/dist/react.js"></script>
    <script src="https://unpkg.com/react-dom@15/dist/react-dom.js"></script>
    <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>

    <script type="text/jsx">
class CounterButton extends React.PureComponent {
  constructor(props) {
    super(props);
    this.state = {count: 1};
  }

  render() {
      return (
        <button
        color={this.props.color}
        onClick={() => this.setState(prevState => ({count: prevState.count + 1}))}>
        Count: {this.state.count}
        </button>
      );
  }
}

ReactDOM.render(
  <CounterButton color="red" />,
  document.getElementById('root')
);
    </script>
</body>

</html>