jQuery deferred.isRejected () method
Definition and Usage
deferred.isRejected () function is used to determine whether a Deferred object has been rejected.
Note: 1. From the start jQuery1.7 outdated, please use deferred.state () instead. If Deferred (delay) objects are being denied state, returns true. This means deferred.reject () or deferred.rejectWith () has been called on the object, and failCallbacks has been called (or is in the stage of being called).
2. Deferred (delay) object can have three states: Pending (pending), solve (resolved), or denied (rejected); use deferred.isResolved () to determine whether the delay in resolving the status of the object.
grammar
Tip: This method does not accept any parameters.
deferred.isRejected()