CODE EXAMPLE FOR JAVASCRIPT

mounting in react

class App extends React.Component {
  state = {
    showUser: false
  }

  render() {
    return (
      <div>
        {this.state.showUser && <User name="Brad" />}
        <button onClick={() => this.setState({ showUser: true })}>
          Show User
        </button>
        <button onClick={() => this.setState({ showUser: false })}>
          Hide User
        </button>
      </div>
    )
  }
}

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