Add LoAF Helpers Snippet

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is **WebPerf Snippets** - a curated collection of web performance measurement JavaScript snippets designed for use in browser consoles or Chrome DevTools. The project is a documentation website built with Next.js and Nextra, serving as a comprehensive resource for web performance analysis tools.
+
+## Architecture
+
+### Technology Stack
+- **Framework**: Next.js 13+ with Nextra (documentation theme)
+- **Theme**: nextra-theme-docs for documentation layout
+- **Media**: Cloudinary integration via next-cloudinary for optimized images/videos
+- **Deployment**: Configured for Vercel
+
+### Project Structure
+- `pages/` - MDX documentation files organized by performance categories:
+ - `CoreWebVitals/` - LCP, CLS, and related metrics
+ - `Loading/` - Resource loading, TTFB, scripts, fonts analysis
+ - `Interaction/` - User interaction and animation frame metrics
+- `_meta.json` files - Define navigation structure and page titles
+- `theme.config.jsx` - Nextra theme configuration with custom branding
+- `next.config.js` - Next.js configuration with Nextra integration and redirects
+
+### Content Organization
+The documentation follows a hierarchical structure where:
+- Each category has its own directory under `pages/`
+- Individual snippets are documented in `.mdx` files with code examples
+- Navigation is controlled via `_meta.json` files in each directory
+- All snippets are JavaScript code meant for browser execution
+
+## Development Commands
+
+### Build & Development
+```bash
+# Build the project
+npm run build
+
+# No dev server command defined - check with maintainer
+# Note: Standard Next.js commands likely work (npm run dev)
+```
+
+### Testing
+```bash
+# No tests configured
+npm test # Will show error message
+```
+
+## Key Files to Understand
+
+- `theme.config.jsx` - Contains site branding, meta tags, and navigation configuration
+- `pages/_app.js` - Next.js app wrapper
+- `pages/index.mdx` - Homepage with project introduction and video
+- Individual snippet files contain executable JavaScript with explanations
+
+## Content Guidelines
+
+When working with snippet documentation:
+- Each snippet should include clear explanations and usage instructions
+- Code blocks use the `copy` prop for easy copying to DevTools
+- Snippets are designed for Chrome DevTools console execution
+- Focus on web performance metrics (Core Web Vitals, loading, interactions)
+- Include performance measurement context and interpretation guidance
+
+## Navigation Structure
+
+The site uses Nextra's file-system based routing with `_meta.json` files controlling:
+- Page order in navigation
+- Display titles
+- Category organization
+
+Content is organized around web performance measurement topics, making it easy for developers to find relevant performance analysis tools.