function logProps(Component) { class LogProps extends React.Component { componentDidUpdate(prevProps) { console.log('old props:', prevProps); console.log('new props:', this.props); } render() { // highlight-next-line const {forwardedRef, ...rest} = this.props; // Assign the custom prop "forwardedRef" as a ref // highlight-next-line return ; } } // Note the second param "ref" provided by React.forwardRef. // We can pass it along to LogProps as a regular prop, e.g. "forwardedRef" // And it can then be attached to the Component. // highlight-range{1-3} function forwardRef(props, ref) { return ; } // These next lines are not necessary, // But they do give the component a better display name in DevTools, // e.g. "ForwardRef(logProps(MyComponent))" // highlight-range{1-2} const name = Component.displayName || Component.name; forwardRef.displayName = `logProps(${name})`; return React.forwardRef(forwardRef); }