Lightning Aura Components Developer Guide

What Is the Lightning Component Framework?
Quick Start
Creating Components
Component Names
Create Aura Components in the Developer Console
Create Aura Components Using Salesforce CLI
Component Markup
Component Namespace
Component Bundles
Component IDs
HTML in Components
CSS in Components
Component Attributes
Using Expressions
Component Composition
Component Body
Component Facets
Controlling Access
Using Object-Oriented Development
Best Practices for Conditional Markup
Aura Component Versioning for Managed Packages
Base Components with Minimum API Version Requirements
Validations for Aura Component Code
Using Labels
Localization
Working with Base Lightning Components
Supporting Accessibility
Button Labels
Audio Messages
Forms, Fields, and Labels
Using Images and Icons
Events
Menus
Writing Documentation for the Component Library
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 with Lightning Testing Service
Debugging
Performance
Reference
PDF

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Supporting Accessibility

When customizing components, be careful to preserve code that ensures accessibility, such as the aria attributes.

Accessible software and assistive technology enable users with disabilities to use and interact with the products you build. Aura components are created according to W3C specifications so that they work with common assistive technologies. We recommend that you follow the WCAG Guidelines for accessibility when developing with the Lightning Component framework. This guide explains the accessibility features on components in the lightning namespace, which are also known as base Lightning components.