Code

<!DOCTYPE html>
<html>
<head>
    <title></title>
    <style type="text/css">
        input[type="password"][value$="a"] {
            background: blue;
        }
    </style>
    <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>
    <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
</head>
    <div id="root"></div>
    <script type="text/babel">

      

class NameForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {value: ''};

    this.handleChange = this.handleChange.bind(this);
  }

  handleChange(event) {
    this.setState({value: event.target.value});
  }

  render() {
    return (
      <input type="password" value={this.state.value} onChange={this.handleChange} />
    );
  }
}

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

    </script>
</body>
</html>