Blocks Overview

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What are Blocks?

• Combine multiple UI components into cohesive features
• Include built-in state management and validation
• Provide production-ready styling and UX
• Handle complex integrations with third-party services

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Available Block Categories

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Forms

• Demo Form: Enterprise sales demo request form with email validation
• Intro Form: User onboarding form for free trial signups

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Integrations

• Cal.com: Calendar booking and scheduling
• Lemcal: Meeting scheduler with dialog UI
• Plain: Customer support chat widget

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Telemetry

• Google Analytics: Web analytics tracking
• PostHog: Product analytics and feature flags
• Koala: B2B visitor identification
• Clearbit: Company data enrichment
• RB2B: Website visitor tracking
• Unify: Intent data tracking
• Common Room: Community engagement tracking

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Quick Example

import reflex as rx
import reflex_ui as ui
from reflex_ui.blocks import demo_form_dialog

def index():
    return rx.container(
        # Add a complete demo form dialog
        demo_form_dialog(
            trigger=ui.button("Book a Demo"),
        ),
    )

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Benefits of Using Blocks

1. Save Development Time: Don’t rebuild common features from scratch
2. Production Quality: Battle-tested components with proper error handling
3. Consistent UX: Professional designs that follow best practices
4. Easy Customization: Extend and customize blocks to match your needs
5. Maintained: Blocks are updated as dependencies and best practices evolve

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Customization

# Add custom styling
demo_form_dialog(
    trigger=ui.button("Get Started"),
    class_name="custom-dialog",
)

# Handle custom events
intro_form(
    on_submit=MyState.handle_form_submit,
    id_prefix="signup",
)