Lightning Aura Components Developer Guide

Introducing Aura Components
Quick Start
Creating Components
Using Components
Communicating with 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
Component Library
System Tag Reference
JavaScript API
$A namespace
createComponent()
createComponents()
enqueueAction()
error()
get()
getCallback()
getComponent()
getReference()
getRoot()
getToken()
log()
reportError()
run()
set()
warning()
Action
AuraLocalizationService
Component
Event
Util
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getCallback()

Use $A.getCallback() to wrap any code that modifies a component outside the normal rerendering lifecycle, such as in a setTimeout() call. The $A.getCallback() call ensures that the framework rerenders the modified component and processes any enqueued actions.

Don't use $A.getCallback() if your code is executed as part of the framework's call stack. For example, your code is handling an event or in the callback for an Apex controller action.

Signature

getCallback (function callback)

Parameters

callback
Type: function
The method to call after establishing an Aura context.

Sample Code

1window.setTimeout(
2    $A.getCallback(function() {
3        cmp.set("v.visible", true);
4    }), 5000
5);