nextjs reportWebVitals function
export function reportWebVitals(metric) {
switch (metric.name) {
case 'FCP':
// handle FCP results
break
case 'LCP':
// handle LCP results
break
case 'CLS':
// handle CLS results
break
case 'FID':
// handle FID results
break
case 'TTFB':
// handle TTFB results
break
default:
break
}
}