HeroUI v3 React Development Guide

HeroUI v3 is a component library built on Tailwind CSS v4 and React Aria Components, providing accessible, customizable UI components for React applications.

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Installation

curl -fsSL https://heroui.com/install | bash -s heroui-react

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CRITICAL: v3 Only - Ignore v2 Knowledge

This guide is for HeroUI v3 ONLY. Do NOT apply v2 patterns — the provider, styling, and component API all changed:

Feature	v2 (DO NOT USE)	v3 (USE THIS)
Provider	<HeroUIProvider> required	No Provider needed
Animations	framer-motion package	CSS-based, no extra deps
Component API	Flat props: <Card title="x">	Compound: <Card><Card.Header>
Styling	Tailwind v3 + @heroui/theme	Tailwind v4 + @heroui/styles
Packages	@heroui/system, @heroui/theme	@heroui/react, @heroui/styles

// DO NOT DO THIS - v2 pattern
import { HeroUIProvider } from "@heroui/react";
import { motion } from "framer-motion";

<HeroUIProvider>
	<Card title="Product" description="A great product" />
</HeroUIProvider>;

CORRECT (v3 patterns)

// DO THIS - v3 pattern (no provider, compound components)
import { Card } from "@heroui/react";

<Card>
	<Card.Header>
		<Card.Title>Product</Card.Title>
		<Card.Description>A great product</Card.Description>
	</Card.Header>
</Card>;

Always fetch v3 docs before implementing.

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Core Principles

• Semantic variants (primary, secondary, tertiary) over visual descriptions
• Composition over configuration (compound components)
• CSS variable-based theming with oklch color space
• BEM naming convention for predictable styling

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Accessing Documentation & Component Information

For component details, examples, props, and implementation patterns, always fetch documentation:

Using Scripts

# List all available components
node scripts/list_components.mjs

# Get component documentation (MDX)
node scripts/get_component_docs.mjs Button
node scripts/get_component_docs.mjs Button Card TextField

# Get component source code
node scripts/get_source.mjs Button

# Get component CSS styles (BEM classes)
node scripts/get_styles.mjs Button

# Get theme variables
node scripts/get_theme.mjs

# Get non-component docs (guides, releases)
node scripts/get_docs.mjs /docs/react/getting-started/theming

Direct MDX URLs

Component docs: fetch .mdx with a concrete kebab-case slug. Run node scripts/list_components.mjs when the slug is unknown, and never fetch a URL that still contains a placeholder.

Examples:

• Button: https://heroui.com/docs/react/components/button.mdx
• Modal: https://heroui.com/docs/react/components/modal.mdx
• Form: https://heroui.com/docs/react/components/form.mdx

Getting started guides: use a concrete topic URL such as https://heroui.com/docs/react/getting-started/quick-start.mdx.

Important: Always fetch component docs before implementing. The MDX docs include complete examples, props, anatomy, and API references.

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Installation Essentials

Quick Install

npm i @heroui/styles @heroui/react tailwind-variants

Framework Setup (Next.js App Router - Recommended)

1. Install dependencies:

npm i @heroui/styles @heroui/react tailwind-variants tailwindcss @tailwindcss/postcss postcss

2. Create/update app/globals.css:

/* Tailwind CSS v4 - Must be first */
@import "tailwindcss";

/* HeroUI v3 styles - Must be after Tailwind */
@import "@heroui/styles";

3. Import in app/layout.tsx:

import "./globals.css";

export default function RootLayout({
	children,
}: {
	children: React.ReactNode;
}) {
	return (
		<html lang="en" suppressHydrationWarning>
			<body>
				{/* No Provider needed in HeroUI v3! */}
				{children}
			</body>
		</html>
	);
}

4. Configure PostCSS (postcss.config.mjs):

export default {
	plugins: {
		"@tailwindcss/postcss": {},
	},
};

Critical Setup Requirements

1. Tailwind CSS v4 is MANDATORY - HeroUI v3 will NOT work with Tailwind CSS v3
2. Use Compound Components - Components use compound structure (e.g., Card.Header, Card.Content)
3. Use onPress, not onClick - For better accessibility, use onPress event handlers
4. Import Order Matters - Always import Tailwind CSS before HeroUI styles

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Component Patterns

All components use the compound pattern shown above (dot-notation subcomponents like Card.Header, Card.Content). Don't flatten to props — always compose with subcomponents. Fetch component docs for complete anatomy and examples.

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Semantic Variants

HeroUI uses semantic naming to communicate functional intent:

Variant	Purpose	Usage
primary	Main action to move forward	1 per context
secondary	Alternative actions	Multiple
tertiary	Dismissive actions (cancel, skip)	Sparingly
danger	Destructive actions	When needed
ghost	Low-emphasis actions	Minimal weight
outline	Secondary actions	Bordered style

Don't use raw colors - semantic variants adapt to themes and accessibility.

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Theming

HeroUI v3 uses CSS variables with oklch color space:

:root {
	--accent: oklch(0.6204 0.195 253.83);
	--accent-foreground: var(--snow);
	--background: oklch(0.9702 0 0);
	--foreground: var(--eclipse);
}

Get current theme variables:

node scripts/get_theme.mjs

Color naming:

• Without suffix = background (e.g., --accent)
• With -foreground = text color (e.g., --accent-foreground)

Theme switching:

<html class="dark" data-theme="dark"></html>

For detailed theming, fetch: https://heroui.com/docs/react/getting-started/theming.mdx