Stateless Functional Components in React!<p><pre><code>    const ProgressMeter = ({ className, percentage }) =&gt; {
      const meterStyle = {
        width: `${Math.round(Math.min(Math.max(percentage, 0), 1) * 100)}%`,
      };

      return (
        &lt;div className={cx(&#x27;root&#x27;, className)}&gt;
          &lt;div className={cx(&#x27;meter&#x27;)} style={meterStyle}&#x2F;&gt;
        &lt;&#x2F;div&gt;
      );
    };</code></pre>