PromiseRejectionEvent.reason

The PromiseRejectionEvent.reason read-only property is any JavaScript value or Object which provides the reason passed into Promise.reject(). This in theory provides information about why the promise was rejected.

SyntaxEdit

reason = PromiseRejectionEvent.reason

SpecificationsEdit

Specification	Status	Comment
WHATWG HTML Living Standard The definition of 'PromiseRejectionEvent.reason' in that specification.	Living Standard	Initial definition.

Browser compatibilityEdit

• Desktop
• Mobile

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari
Basic support	49	No support	No support	No support	No support

Feature	Android	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile
Basic support	No support	No support	No support	No support	No support

See alsoEdit

• Promise
• PromiseRejectionEvent
• rejectionhandled
• unhandledrejection