// Example of using web-vitals to measure & report CLS, FID, and LCP.
import {getCLS, getFID, getLCP} from 'web-vitals';
function reportToAnalytics(data) {
const body = JSON.stringify(data);
(navigator.sendBeacon && navigator.sendBeacon('/analytics', body)) ||
fetch('/analytics', {body, method: 'POST', keepalive: true});
}
getCLS((metric) => reportToAnalytics({cls: metric.value}));
getFID((metric) => reportToAnalytics({fid: metric.value}));
getLCP((metric) => reportToAnalytics({lcp: metric.value}));
