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
Supported JavaScript
Invoking Actions on Component Initialization
Sharing JavaScript Code in a Component Bundle
Sharing JavaScript Code Across Components
Using External JavaScript Libraries
Dynamically Creating Components
Detecting Data Changes with Change Handlers
Finding Components by ID
Working with Attribute Values in JavaScript
Working with a Component Body in JavaScript
Working with Events in JavaScript
Modifying the DOM
Checking Component Validity
Modifying Components Outside the Framework Lifecycle
Throwing and Handling Errors
Calling Component Methods
Dynamically Adding Event Handlers To a Component
Dynamically Showing or Hiding Markup
Adding and Removing Styles
Which Button Was Pressed?
Formatting Dates in JavaScript
Using JavaScript Promises
Making API Calls from Components
Control Access to Browser Features
Manage Trusted URLs
Working with Salesforce Data
Testing Components
Debugging
Performance
Reference
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Which Button Was Pressed?

To find out which button was pressed in a component containing multiple buttons, use Component.getLocalId().

Let’s look at an example with multiple lightning:button components. Each button has a unique local ID, set by an aura:id attribute.

Use event.getSource() in the client-side controller to get the button component that was clicked. Call getLocalId() to get the aura:id of the clicked button.

In the client-side controller, you can use one of the following methods to find out which button was clicked.
  • event.getSource().getLocalId() returns the aura:id of the clicked button.
  • event.getSource().get("v.name") returns the name of the clicked button.