text: const reportWebVitals = onPerfEntry => {
      if ( onPerfEntry && ( onPerfEntry instanceof Function ) ) {
          import( `web-vitals` ).then( ( { getCLS, getFID, getFCP, getLCP, getTTFB } ) => {
              getCLS( onPerfEntry );
              getFID( onPerfEntry );
              getFCP( onPerfEntry );
              getLCP( onPerfEntry );
              getTTFB( onPerfEntry );
          } );
      }
  };
  
  export default reportWebVitals;
  