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
Lightning Component Library
System Tag Reference
JavaScript API
$A namespace
Action
AuraLocalizationService
Component
Event
Util
addClass()
getBooleanValue()
hasClass()
isArray()
isEmpty()
isObject()
isUndefined()
isUndefinedOrNull()
removeClass()
toggleClass()
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isUndefinedOrNull()

Checks if the object is undefined or null.

Signature

isUndefinedOrNull(Object obj)

Parameters

obj: Type: Object. The object to check.

Returns

Type: Boolean

Returns true if the object is undefined or null, or false otherwise.