src/reportWebVitals.js


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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;