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    PromiseRejectionEvent

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    The PromiseRejectionEvent interface represents events which are fired when JavaScript Promises are rejected. These events are particularly useful for telemetry and debugging purposes.

    Constructor

    PromiseRejectionEvent()
    Creates a PromiseRejectionEvent event with the given parameters.

    Properties

    Also inherits properties from its parent Event.

    PromiseRejectionEvent.promise Read only
    The JavaScript Promise which resulted in rejection.
    PromiseRejectionEvent.reason Read only
    A value or Object indicating why the promise was rejected, as passed to Promise.reject().

    Methods

    No specific methods; inherits methods from its parent Event.

    Events

    unhandledrejection
    Fired when a JavaScript Promise is rejected but there is no rejection handler to deal with the rejection.
    rejectionhandled
    Fired when a JavaScript Promise is rejected, and after the rejection is handled by the promise's rejection handling code.

    Specifications

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

    Browser compatibility

    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 also

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