Definition
Long Tasks API defines PerformanceLongTaskTiming
[Exposed=Window]
interface PerformanceLongTaskTiming : PerformanceEntry {
/* Overloading PerformanceEntry */
readonly attribute DOMHighResTimeStamp startTime;
readonly attribute DOMHighResTimeStamp duration;
readonly attribute DOMString name;
readonly attribute DOMString entryType;
readonly attribute FrozenArray<TaskAttributionTiming> attribution;
[Default] object toJSON();
};