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 the 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
Validation When You Save Code Changes
Validation During Development Using the Salesforce CLI
Review and Resolve Validation Errors and Warnings
Aura Component Validation Rules
Salesforce Lightning CLI (Deprecated)
Using Labels
Localization
Working with Base Lightning Components
Working with UI Components
Supporting Accessibility
Writing Documentation for the Component Library
Using Components
Communicating with Events
Communicating Across the DOM with Lightning Message Service (Beta)
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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Salesforce Lightning CLI (Deprecated)

Lightning CLI was a Heroku Toolbelt plugin to scan your code for general JavaScript coding issues and Lightning-specific issues. Lightning CLI is deprecated in favor of the force:lightning:lint tool available in the Salesforce CLI.
We recommend creating Aura components using the Developer Console or the Salesforce CLI.

For more information about code validation using Salesforce DX, see the Salesforce CLI Command Reference.