PerformanceEventTiming: cancelable property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used 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 |