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January 18, 20267 min readReplay: Creating UI

Replay: Creating UI Style Guides with AI

R
Replay Team
Developer Advocates

TL;DR: Replay uses AI to analyze video recordings of UI interactions and generate comprehensive, reusable UI style guides, streamlining design consistency and development workflows.

Stop Guessing, Start Replaying: AI-Powered UI Style Guide Generation#

Creating and maintaining a consistent UI style guide is a constant battle for development teams. Manually documenting components, colors, and interactions is time-consuming, error-prone, and often falls by the wayside as deadlines loom. Existing screenshot-to-code solutions offer a partial fix, but they miss a crucial element: user behavior. They can represent the visual style, but not the how and why of user interactions. That's where Replay comes in.

Replay leverages AI to analyze video recordings of real UI interactions and automatically generate comprehensive, reusable UI style guides. By understanding user behavior through "Behavior-Driven Reconstruction," Replay goes beyond static screenshots, capturing the nuances of UI elements and their interactions to create a living, breathing style guide that truly reflects your product.

The Problem with Traditional Style Guides#

Traditional UI style guides often suffer from several key issues:

  • Static and Outdated: Manually created style guides quickly become outdated as the UI evolves.
  • Incomplete Documentation: It's difficult to capture every nuance of a UI element's behavior in static documentation.
  • Lack of Context: Style guides often lack the context of how UI elements are actually used in real-world scenarios.
  • Maintenance Overhead: Maintaining a style guide requires significant time and effort from designers and developers.
  • Inconsistency: Manually documenting styles can lead to inconsistencies across the UI.

Replay: A New Approach to UI Style Guides#

Replay offers a revolutionary approach to UI style guide creation, addressing the limitations of traditional methods by leveraging the power of AI and video analysis. By analyzing video recordings of UI interactions, Replay understands the intent behind the design, not just the visual appearance. This enables the generation of more accurate, comprehensive, and maintainable style guides.

Here's how Replay stacks up against other approaches:

FeatureScreenshot-to-Code ToolsManual Style GuidesReplay
Video Input
Behavior Analysis
Automatic Generation
Style InjectionPartial
Multi-Page SupportLimited✅ (Manual)
Supabase IntegrationPossible
AccuracyLowHigh (but time-consuming)High
Maintenance EffortHighHighLow

How Replay Generates UI Style Guides#

Replay uses a multi-step process to generate UI style guides from video recordings:

  1. Video Capture: Record a video of a user interacting with your UI. This video serves as the source of truth for the style guide.

  2. AI-Powered Analysis: Replay's AI engine analyzes the video, identifying UI elements, their properties, and their interactions. This includes:

    • Identifying colors, fonts, and spacing.
    • Recognizing UI components like buttons, forms, and navigation elements.
    • Understanding the behavior of UI elements in response to user actions (e.g., hover states, click events, transitions).
    • Mapping the product flow and user journey.
  3. Code Generation: Replay generates clean, semantic code representing the UI elements and their styles. This code can be exported in various formats, including:

    • CSS
    • HTML
    • React components
    • Other framework-specific components
  4. Style Injection: Replay allows you to inject the generated styles directly into your existing codebase, ensuring consistency across your application.

  5. Supabase Integration: Replay seamlessly integrates with Supabase, allowing you to store and manage your UI style guide in a centralized location.

Building a Style Guide with Replay: A Step-by-Step Guide#

Here's a practical example of how to use Replay to generate a UI style guide:

Step 1: Record Your UI Interaction#

Record a video showcasing the UI elements and interactions you want to include in your style guide. For example, record yourself navigating through your website, interacting with buttons, forms, and other components.

💡 Pro Tip: Focus on clear and deliberate interactions to ensure Replay accurately captures the behavior of your UI elements.

Step 2: Upload and Analyze the Video#

Upload the video to Replay. The AI engine will automatically analyze the video and identify the UI elements and their properties.

Step 3: Review and Refine the Results#

Review the generated code and make any necessary adjustments. Replay provides a user-friendly interface for editing the code and refining the style guide.

Step 4: Export and Integrate the Style Guide#

Export the generated style guide in your preferred format (e.g., CSS, React components) and integrate it into your codebase.

Example: Generating a Button Component Style#

Let's say you have a button component with the following styles:

  • Background color:
    text
    #007bff
  • Text color:
    text
    #fff
  • Font size:
    text
    16px
  • Padding:
    text
    10px 20px
  • Border radius:
    text
    5px

After analyzing the video, Replay might generate the following CSS code:

css
/* Generated by Replay */ .button { background-color: #007bff; color: #fff; font-size: 16px; padding: 10px 20px; border-radius: 5px; cursor: pointer; } .button:hover { background-color: #0056b3; }

This code can then be easily integrated into your existing CSS stylesheet or used to create a React component:

typescript
// Generated by Replay import React from 'react'; interface ButtonProps { children: React.ReactNode; onClick?: () => void; } const Button: React.FC<ButtonProps> = ({ children, onClick }) => { return ( <button className="button" onClick={onClick}> {children} </button> ); }; export default Button;

📝 Note: The generated code may vary depending on the complexity of the UI and the quality of the video recording.

Benefits of Using Replay for UI Style Guide Generation#

  • Increased Efficiency: Automate the creation of UI style guides, saving significant time and effort.
  • Improved Consistency: Ensure consistent styling across your application by using a centralized style guide.
  • Enhanced Collaboration: Facilitate collaboration between designers and developers by providing a shared understanding of the UI.
  • Reduced Maintenance Overhead: Easily update and maintain your style guide as your UI evolves.
  • Better User Experience: Create a more consistent and intuitive user experience by adhering to a well-defined style guide.
  • Behavior-Driven Design: Captures the dynamic behavior of UI elements, something static screenshots can't.

⚠️ Warning: While Replay significantly accelerates the style guide creation process, human review is still recommended to ensure accuracy and completeness.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited features and usage. Paid plans are available for more advanced features and higher usage limits. Check the Replay website for current pricing details.

How is Replay different from v0.dev?#

While both tools aim to generate UI code, Replay distinguishes itself through its video-first approach and focus on behavior analysis. v0.dev relies on text prompts and code generation models, whereas Replay analyzes real-world UI interactions captured in video. This allows Replay to understand the intent behind the design, leading to more accurate and functional code. Replay also offers features like style injection and Supabase integration, streamlining the integration process.

What video formats are supported?#

Replay supports common video formats like MP4, MOV, and WebM.

Can I customize the generated code?#

Yes, Replay provides a user-friendly interface for editing the generated code and customizing the style guide.

How does Replay handle complex UI interactions?#

Replay's AI engine is designed to handle complex UI interactions, including animations, transitions, and dynamic content. However, the accuracy of the generated code may vary depending on the complexity of the interaction and the quality of the video recording.


Ready to try behavior-driven code generation? Get started with Replay - transform any video into working code in seconds.

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