didTimeout property
The read-only didTimeout property on the
IdleDeadline interface is a Boolean value which
indicates whether or not the idle callback is being invoked because the
timeout interval
specified when Window.requestIdleCallback was called has expired.
If didTimeout is true, the IdleDeadline object's
IdleDeadline.timeRemaining method will return
approximately 0.
Idle callbacks support the concept of a timeout in order to ensure that
whatever task
they're meant to perform actually happens, even if the user agent never
has enough idle
time available. Your callback will typically check the value of
didTimeout
if it needs to perform an action even if the browser is too busy to grant
you the time;
you should react by performing the needed task or, ideally, a minimal
amount of work
that can be done to keep things moving along, then schedule a new callback
to try again
to get the rest of the work done.
Implementation
external bool get didTimeout;