TaskPriorityChangeEvent
The TaskPriorityChangeEvent
is the interface for the prioritychange
event.
Constructor
TaskPriorityChangeEvent()
-
Creates a new
TaskPriorityChangeEvent
object, setting an event name and previous priority.
Instance properties
This interface also inherits the properties of its parent, Event
.
TaskPriorityChangeEvent.previousPriority
Read only-
Returns the priority of the corresponding
TaskSignal
before thisprioritychange
event.
Instance methods
This interface has no methods of its own, but inherits the methods of its parent, Event
.
Examples
An object of this type is returned in the handler for a prioritychange
event.
The code below shows a handler in which the newPriority
and previousPriority
are logged.
js
// Listen for 'prioritychange' events on the controller's signal.
controller.signal.addEventListener("prioritychange", (event) => {
const previousPriority = event.previousPriority;
const newPriority = event.target.priority;
console.log(`Priority changed from ${previousPriority} to ${newPriority}.`);
});
A more complete live example can be found in prioritychange
event > Examples.
Specifications
Specification |
---|
Prioritized Task Scheduling # sec-task-priority-change-event |
Browser compatibility
BCD tables only load in the browser
See also
prioritychange
event