Lightning Aura Components Developer Guide

What Is the Lightning Component Framework?
What is Salesforce Lightning?
Why Use the Aura Components Programming Model?
Aura Components
Events
Browser Support for Aura Components
My Domain Is Required to Use Lightning Components in Your Salesforce Org
Using the Developer Console
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 with Lightning Testing Service
Debugging
Performance
Reference
PDF

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What Is the Lightning Component Framework?

The Lightning Component framework is a UI framework for developing single page applications for mobile and desktop devices.

As of Spring ’19 (API version 45.0), you can build Lightning components using two programming models: the Lightning Web Components model, and the original Aura Components model. Lightning web components are custom HTML elements built using HTML and modern JavaScript. Lightning web components and Aura components can coexist and interoperate on a page.

Configure Lightning web components and Aura components to work in Lightning App Builder and Experience Builder. Admins and end users don��t know which programming model was used to develop the components. To them, they’re simply Lightning components.

This developer guide covers how to develop custom Aura components. The Lightning Web Components Developer Guide covers how to develop custom Lightning web components.