Limited availability
The read-only cancelable property returns the associated event's cancelable property, indicating whether the event can be canceled.
A boolean. true if the associated event is cancelable, false otherwise.
The cancelable property can be used when observing event-timing entries (PerformanceEventTiming). For example, to log and measure non-cancelable events only.
const observer = new PerformanceObserver((list) => {
list.getEntries().forEach((entry) => {
if (!entry.cancelable) {
const delay = entry.processingStart - entry.startTime;
console.log(entry.name, delay);
}
});
});
// Register the observer for events
observer.observe({ type: "event", buffered: true });
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