React-4.js

class App extends React.Component { 
  
  constructor() {
    super();
    this.state = {
      active: true,
    }
  }

  onClick(event) {
    const { active } = this.state;
    this.setState({
      active: !active,
    });
    this.input.focus(); //focus <--
  }

  render() {
    const { active } = this.state;

    return (
      <div>
        <Button 
          description={active ? 'Ativado' : 'Desativado'}
          onClick={this.onClick.bind(this)}
         />
         <input ref={input => this.input = input} />
      </div>
    );
  }
}