coach-core
Version:
Core package for the Coach.
26 lines (25 loc) • 888 B
JavaScript
(function () {
'use strict';
const supported = PerformanceObserver.supportedEntryTypes;
if (!supported || !supported.includes('largest-contentful-paint')) {
return;
}
const observer = new PerformanceObserver(() => {});
observer.observe({ type: 'largest-contentful-paint', buffered: true });
const entries = observer.takeRecords();
if (entries.length > 0) {
const largestEntry = entries.at(-1);
return {
duration: largestEntry.duration,
id: largestEntry.id,
url: largestEntry.url,
loadTime: Number(largestEntry.loadTime.toFixed(0)),
renderTime: Number(
Math.max(largestEntry.renderTime, largestEntry.loadTime).toFixed(0)
),
size: largestEntry.size,
startTime: Number(largestEntry.startTime.toFixed(0)),
tagName: largestEntry.element ? largestEntry.element.tagName : ''
};
} else return;
})();