Lightning Aura Components Developer Guide

Introducing Aura Components
Quick Start
Creating Components
Using Components
Communicating with Events
Actions and Events
Handling Events with Client-Side Controllers
Component Events
Application Events
Event Handler Behavior for Active Components
Event Handling Lifecycle
Advanced Events Example
Firing Events from Non-Aura Code
Events Best Practices
Events Fired During the Rendering Lifecycle
Events Handled in the Salesforce Mobile App and Lightning Experience
System Events
Communicating Across the DOM with Lightning Message Service
Creating Apps
Styling Apps
Developing Secure Code
Using JavaScript
Working with Salesforce Data
Testing Components
Debugging
Performance
Reference
PDF

System Events

The framework fires several system events during its lifecycle.

You can handle these events in your Lightning apps or components, and within the Salesforce mobile app.

For examples, see the Lightning Component Library.

Event Name Description
aura:doneRendering (deprecated) Indicates that the initial rendering of the root application has completed.
aura:doneWaiting (deprecated) Indicates that the app is done waiting for a response to a server request. This event is preceded by an aura:waiting event.
aura:locationChange Indicates that the hash part of the URL has changed.
aura:noAccess Indicates that a requested resource is not accessible due to security constraints on that resource.
aura:systemError Indicates that an error has occurred.
aura:valueChange Indicates that an attribute value has changed.
aura:valueDestroy Indicates that a component has been destroyed.
aura:valueInit Indicates that an app or component has been initialized.
aura:valueRender Indicates that an app or component has been rendered or rerendered.
aura:waiting (deprecated) Indicates that the app is waiting for a response to a server request.

Note: The aura:doneRendering event is deprecated. Unless your component is running in complete isolation in a standalone app and not included in complex apps, such as Lightning Experience or the Salesforce mobile app, the container app may trigger your event handler multiple times. This behavior makes it difficult to handle each event appropriately.

Note: The aura:doneWaiting event is deprecated. The aura:doneWaiting application event is fired for every server response, even for responses from other components in your app. Unless your component is running in complete isolation in a standalone app and not included in Lightning Experience or the Salesforce mobile app, the container app may trigger your event handler multiple times. This behavior makes it difficult to handle each event appropriately.

Note: The aura:waiting event is deprecated. The aura:waiting application event is fired for every server request, even for requests from other components in your app. Unless your component is running in complete isolation in a standalone app and not included in Lightning Experience or the Salesforce mobile app, the container app may trigger your event handler multiple times. This behavior makes it difficult to handle each event appropriately.