Lightning Components Developer Guide

What is the Lightning Component Framework?
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Creating Components
Using Components
Communicating with Events
Creating Apps
Debugging
Fixing Performance Warnings
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Supported aura:attribute Types
aura:application
aura:component
aura:dependency
aura:event
aura:interface
aura:method
aura:set
Component Reference
Messaging Component Reference
Interface Reference
Event Reference
System Event Reference
aura:doneRendering
aura:doneWaiting
aura:locationChange
aura:systemError
aura:valueChange
aura:valueDestroy
aura:valueInit
aura:valueRender
aura:waiting
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aura:systemError

Indicates that an error has occurred.
This event is automatically fired when an error is encountered during the execution of a server-side action. The aura:systemError event is handled by a client-side controller. A component can have only one <aura:handler event="aura:systemError"> tag in markup to handle this event.
This example shows a button that triggers an error and a handler for the aura:systemError event .
This client-side controller triggers the firing of an error and handles that error.
The aura:handler tag for the aura:systemError event contains these required attributes.
Attribute Name Type Description
event String The name of the event, which must be set to aura:systemError.
action Object The client-side controller action that handles the event.
The aura:systemError event contains these attributes. You can retrieve the attribute values using event.getParam("attributeName").
Attribute Name Type Description
message String The error message.
error String The error object.