Performance: eventCounts property

// Report all exposed events
for (entry of performance.eventCounts.entries()) {
  const type = entry[0];
  const count = entry[1];
  // sendToEventAnalytics(type, count);
}
// Report a specific event
const clickCount = performance.eventCounts.get("click");
// sendToEventAnalytics("click", clickCount);
// Check if an event count is exposed for a type
const isExposed = performance.eventCounts.has("mousemove"); // false