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