The read-only performance.eventCounts
property is an EventCounts
map containing the number of events which have been dispatched per event type.
Not all event types are exposed. You can only get counts for event types supported by the PerformanceEventTiming
interface.
An EventCounts
map. (A read-only Map
without the clear()
, delete()
, and set()
methods).
If you like to send event counts to your analytics, you may want to implement a function like sendToEventAnalytics
which takes the event counts from the performance.eventCounts
map and then uses the Fetch API to post the data to your endpoint.
for (entry of performance.eventCounts.entries()) {
const type = entry[0];
const count = entry[1];
}
const clickCount = performance.eventCounts.get("click");
const isExposed = performance.eventCounts.has("mousemove");