Comment afficher ou masquer dynamiquement des éléments dans React Using State ?

<code class="js">var Search = React.createClass({
    handleClick: function (event) {
        console.log(this.prop);
    },
    render: function () {
        return (
            <div className="date-range">
                <input type="submit" value="Search" onClick={this.handleClick} />
            </div>
        );
    },
});

var Results = React.createClass({
    render: function () {
        return (
            <div id="results" className="search-results">
                Some Results
            </div>
        );
    },
});

React.renderComponent(<Search />, document.body);</code>

<code class="js">const Search = () => {
  // Initialize state to hide results
  const [showResults, setShowResults] = React.useState(false);

  // Toggle results visibility on click
  const onClick = () => setShowResults(true);

  return (
    <div>
      <input type="submit" value="Search" onClick={onClick} />
      { showResults ? <Results /> : null }
    </div>
  );
};

const Results = () => (
  <div id="results" className="search-results">
    Some Results
  </div>
);

// Render the component
ReactDOM.render(<Search />, document.getElementById('container'));</code>