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January 5, 20266 min readReplay AI: Building

Replay AI: Building a Portfolio Website Interface with React Components

R
Replay Team
Developer Advocates

TL;DR: Replay AI revolutionizes portfolio website creation by generating React components directly from video demonstrations, enabling rapid prototyping and development based on observed user behavior.

Stop building portfolio websites the hard way. You know the drill: hours meticulously crafting pixel-perfect designs, wrestling with responsiveness, and debugging endless styling issues. Meanwhile, your actual portfolio languishes, unseen. The problem isn’t a lack of design skill, it’s the tedious translation from concept to code. Screenshot-to-code tools offer a semblance of efficiency, but they fall flat when faced with dynamic user interactions and multi-page flows. They see static images; they don't understand intent.

Enter Replay, the video-to-code engine that's changing the game. Replay uses Gemini to analyze video recordings of user interfaces and reconstruct them into working React components. We're talking about behavior-driven reconstruction – video as the single source of truth. No more guesswork, no more static mockups. Just record, analyze, and deploy.

Why Video-to-Code is the Future#

The traditional approach to UI development is fundamentally flawed. We start with static designs, then painstakingly translate them into code. This process is prone to errors, inconsistencies, and endless revisions. Screenshot-to-code tools offer a marginal improvement, but they’re limited by their inability to understand user behavior.

Replay tackles this problem head-on by using video as the primary input. By analyzing video recordings, Replay can understand:

  • User interactions: Clicks, scrolls, form submissions
  • Page transitions: Navigation between different sections of the website
  • Dynamic content: Data fetched from APIs, user-generated content

This allows Replay to generate code that accurately reflects the intended behavior of the UI. The result? Faster development cycles, fewer bugs, and a more intuitive user experience.

typescript
// Example of a generated React component from Replay import React from 'react'; const HeroSection = () => { return ( <div className="hero-container"> <h1>Welcome to My Portfolio</h1> <p>Showcasing my best work and skills.</p> <button>View Projects</button> </div> ); }; export default HeroSection;

Building a Portfolio Website with Replay: A Step-by-Step Guide#

Let's walk through the process of building a portfolio website interface using Replay. We'll focus on generating the core React components from a video demonstration.

Step 1: Capture the Video#

Record a video of yourself interacting with a portfolio website design (either a live site or a prototype). Make sure to showcase all the key features and user flows you want to replicate. This is your "source of truth" for the desired behavior.

💡 Pro Tip: Speak clearly while recording. Explain your actions and the intended purpose of each element. This helps Replay understand your intent and generate more accurate code.

Step 2: Upload and Analyze with Replay#

Upload the video to Replay. The AI engine will analyze the video, identify UI elements, and understand the relationships between them. This process typically takes a few minutes, depending on the length and complexity of the video.

Step 3: Review and Refine#

Once the analysis is complete, Replay will present you with a generated code preview. Review the code and make any necessary adjustments. You can edit the code directly within Replay or export it to your favorite code editor.

📝 Note: Replay provides options to configure the output, such as choosing the framework (React, Vue, etc.) and styling approach (CSS modules, styled-components, etc.).

Step 4: Integrate with Your Project#

Copy the generated React components into your project and integrate them with your existing codebase. You can then customize the components further to match your specific design requirements.

typescript
// Example of integrating a generated component into a page import React from 'react'; import HeroSection from './components/HeroSection'; import ProjectsSection from './components/ProjectsSection'; const HomePage = () => { return ( <div> <HeroSection /> <ProjectsSection /> </div> ); }; export default HomePage;

Replay's Key Features for Portfolio Development#

Replay offers a range of features that are specifically designed to accelerate portfolio website development:

  • Multi-Page Generation: Replay can analyze videos of multi-page websites and generate code for all the pages and components.
  • Supabase Integration: Seamlessly integrate your portfolio website with Supabase for data storage and authentication.
  • Style Injection: Replay can automatically inject styles into your components, ensuring that they look exactly like the original design.
  • Product Flow Maps: Replay generates visual flow diagrams showing how users interact with your website, making it easier to understand and optimize the user experience.

Replay vs. Traditional Development and Screenshot-to-Code#

Let's be honest, the current landscape of UI development tools is… lacking. Traditional methods are slow and error-prone, while screenshot-to-code tools are superficial at best. Replay offers a fundamentally different approach, leveraging the power of video and AI to create a truly intelligent code generation engine.

FeatureTraditional DevelopmentScreenshot-to-CodeReplay
Input SourceStatic DesignsScreenshotsVideo
Behavior AnalysisManualLimitedComprehensive
Code AccuracyLow (prone to errors)MediumHigh
Development SpeedSlowModerateFast
Understanding of User IntentNoneLimitedExcellent
Multi-Page SupportManualLimited
Dynamic Content HandlingManualLimited

⚠️ Warning: Don't fall for the hype of simple screenshot-to-code tools. They might create a basic layout, but they can't capture the nuances of user interaction and dynamic behavior.

The Benefits of Behavior-Driven Reconstruction#

The key advantage of Replay's behavior-driven reconstruction approach is that it ensures that the generated code accurately reflects the intended behavior of the UI. This leads to a number of benefits:

  • Faster Development Cycles: Generate code in minutes instead of hours.
  • Fewer Bugs: Reduce the risk of errors by automatically generating code from a trusted source.
  • Improved User Experience: Create more intuitive and user-friendly interfaces by capturing the nuances of user interaction.
  • Simplified Collaboration: Easily share video demonstrations with your team and generate code that everyone can understand.
  • Rapid Prototyping: Quickly create prototypes of new features and test them with real users.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited usage. Paid plans are available for users who need more advanced features and higher usage limits.

How is Replay different from v0.dev?#

While v0.dev uses text prompts to generate code, Replay analyzes video recordings of user interfaces. This allows Replay to understand user behavior and generate code that accurately reflects the intended functionality. Replay focuses on capturing the how of the UI, not just the what.

What frameworks does Replay support?#

Currently, Replay primarily supports React. Support for other frameworks, such as Vue and Angular, is planned for future releases.

Can I use Replay to generate code for complex web applications?#

Yes! Replay is designed to handle complex web applications with multiple pages, dynamic content, and intricate user flows. The key is to provide a clear and comprehensive video demonstration of the desired functionality.


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