What are the main features of CVA?

The main features include: 1) Instant variant generation - creating all possible variants in one go, 2) Property linking - allowing properties to vary together for consistency, 3) Automated variant management for cleaner design systems, and 4) Support for both SSR/SSG environments.

What pricing plans does CVA offer?

CVA offers two main plans: 1) Unlimited plan at $134.40/month (30% off from $192), which includes 500/month variants generation and early access to beta features, 2) Lifetime plan at $349 (discounted from $549) which includes unlimited lifetime variants generation and premium support.

Is CVA suitable for all environments?

While CVA is a tiny library, it's best used in SSR/SSG (Server-Side Rendering/Static Site Generation) environments, as users typically don't need this JavaScript for static components.

How does CVA help with design systems?

CVA helps create healthier design systems by simplifying and accelerating variant management, reducing manual work, minimizing mistakes, and creating a more scalable system through automation.

CVA - Component Variants Automator

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CVA (Component Variants Automator) is a utility library that helps manage CSS class names and variants in a structured and type-safe way, making it easier to create and maintain consistent component styling across applications.

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更新日:2025年02月28日

CVA - Component Variants Automatorとは

Class Variance Authority (CVA) is a powerful utility designed to help developers manage component variants and CSS class names in a more organized and maintainable way. It provides a straightforward API for defining and applying class variants, particularly useful when working with CSS frameworks like Tailwind CSS. CVA is best utilized in Server-Side Rendering (SSR) or Static Site Generation (SSG) environments, offering a lightweight solution for handling component styling variations without requiring client-side JavaScript.

CVA - Component Variants Automatorの主な機能

CVA (Component Variants Automator) is a utility library that helps developers manage CSS class names and component variants in a structured and type-safe way. It provides a straightforward API for defining and applying class variants, making it easier to handle different component states without manually modifying each variant, especially useful when working with frameworks like React, Next.js, and styling solutions like Tailwind CSS.

Variant Management: Allows definition of multiple style variants with no limit, including boolean variants and compound variants that can be applied when multiple conditions are met

Type-Safe API: Provides first-class variant API with TypeScript support for maintaining type safety across component variants

Default Variants: Enables setting default styles when no specific variants are provided, ensuring consistent component appearance

Compound Variants: Supports defining styles that apply when multiple variant conditions are met simultaneously

CVA - Component Variants Automatorのユースケース

Design System Development: Creating and maintaining consistent component libraries with multiple style variations across large applications

Component Styling with Tailwind: Managing complex Tailwind CSS class combinations for components with multiple variants and states

Reusable Component Creation: Building flexible, reusable components that can adapt to different contexts and requirements without code duplication

メリット

Improves code maintainability and readability

Reduces manual work in variant management

Provides type safety and better developer experience

デメリット

Best used in SSR/SSG environment as it adds JavaScript overhead

May have limitations for complex design systems

Learning curve for new developers

CVA - Component Variants Automatorの使い方

Install CVA: Install the CVA library in your project by running 'npm i class-variance-authority'

Import CVA: Import the cva function and VariantProps from class-variance-authority in your component file

Define Base Styles: Create a variable that calls cva() with your base/default styles as the first argument (can be array of class names)

Configure Variants: Add a variants object as the second argument to cva() to define different style variations (like size, intent, color etc)

Add Compound Variants (Optional): Define compound variants to apply styles when multiple variant conditions are met using the compoundVariants property

Set Default Variants (Optional): Specify default values for variants using the defaultVariants property

Create Component Props Interface: Create a props interface that extends both HTML element props and VariantProps from your cva styles

Use in Component: Use the cva function in your component to generate the appropriate class names based on the provided variant props

Apply Variants: When using the component, pass variant props to get the corresponding styles applied

CVA - Component Variants Automatorのよくある質問

CVA (Component Variants Automator) is a tool that automatically generates component variants, primarily designed to save time by automating the repetitive work of creating component variations in design systems.