PerformanceEventTiming: cancelable property
Baseline
2025
Newly available
Since December 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
The read-only cancelable property returns the associated event's cancelable property, indicating whether the event can be canceled.
Value
A boolean. true if the associated event is cancelable, false otherwise.
Examples
Observing non-cancelable events
The cancelable property can be used when observing event-timing entries (PerformanceEventTiming). For example, to log and measure non-cancelable events only.
js
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 });
Specifications
| Specification |
|---|
| Event Timing API # dom-performanceeventtiming-cancelable |