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
Using the Salesforce Lightning Design System in Apps
Using External CSS
More Readable Styling Markup with the join Expression
Tips for CSS in Components
CSS for RTL Languages
Vendor Prefixes
Styling with Design Tokens and Styling Hooks
Tokens Bundles
Create a Tokens Bundle
Defining and Using Tokens
Using Expressions in Tokens
Extending Tokens Bundles
Using Standard Design Tokens
Replace Design Tokens with Styling Hooks
Developing Secure Code
Using JavaScript
Working with Salesforce Data
Testing Components
Debugging
Performance
Reference
PDF

Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Styling with Design Tokens and Styling Hooks

Capture the essential values of your visual design into named tokens or global styling hooks. Reuse these values throughout your Lightning components CSS resources. Tokens and styling hooks make it easy to ensure that your design is consistent, and even easier to update your design as it evolves.

Salesforce recommends that you use Styling Hooks instead of design tokens if possible. While existing design tokens still work, styling hooks are the future of customization for Lightning web components and Aura components. See Replace Design Tokens with Styling Hooks.

Important

Design tokens and styling hooks are visual design “atoms” for building a design for your components or apps. Specifically, they’re named entities that store visual design attributes: pixel values for margins and spacing, font sizes and families, or hex values for colors. Both design tokens and styling hooks are a terrific way to centralize the low-level values, which you then use to compose the styles that make up the design of your component or app.