jmespath-playground/DEVELOPMENT.md

Development Guide

Quick Start Commands

# Install dependencies
npm install

# Start development server (with hot reload)
npm start

# Build for production
npm run build

# Run tests
npm test

# Serve production build locally
npm run serve

Docker Commands

# Build Docker container
docker build -t jmespath-playground .

# Run Docker container
docker run -p 3000:3000 jmespath-playground

# Development with Docker Compose
docker-compose --profile dev up jmespath-playground-dev

# Production with Docker Compose
docker-compose up jmespath-playground

Project Structure Overview

src/
├── App.js          # Main component with JMESPath logic
├── App.css         # App-specific styles
├── App.test.js     # Basic tests
├── index.js        # React entry point
├── index.css       # Global styles and Bootstrap overrides
└── setupTests.js   # Test configuration

Key Features Implemented

1. Real-time JMESPath Evaluation: Uses the jmespath library to evaluate expressions as user types
2. JSON Validation: Parses and validates JSON input with error reporting
3. Bootstrap UI: Responsive layout with cards, buttons, and form controls
4. Error Handling: Clear error messages for both JSON and JMESPath syntax issues
5. Sample Data: Pre-loaded examples with "Load Sample" button
6. JSON Formatting: "Format JSON" button to prettify JSON input
7. Clear Function: "Clear All" button to reset all inputs

Component Architecture

The main App.js component manages:

• State for JMESPath expression, JSON data, results, and errors
• Auto-evaluation using useEffect when inputs change
• Error handling for both JSON parsing and JMESPath evaluation
• UI event handlers for buttons and input changes

Styling

• Bootstrap 5.3.2 for responsive grid and components
• Custom CSS for enhanced UX (color coding, hover effects)
• Gradient header with professional appearance
• Color-coded input areas (yellow for JMESPath, green for JSON, blue for results)

Browser Compatibility

Built with React 18 and targets:

• Modern evergreen browsers
• Node.js 24 LTS compatibility
• Mobile-responsive design

CI/CD Pipeline

GitHub Actions Workflow

The project includes automated container building via GitHub Actions:

Triggers:

• Push to main or develop branches
• Changes in src/, public/, package*.json, or container files
• Pull requests to main branch

Pipeline Steps:

1. Checkout code and setup Node.js 24 LTS
2. Install dependencies with npm ci
3. Run test suite with coverage
4. Build React production bundle
5. Build and test Docker container
6. Upload build artifacts
7. Create multi-platform images (main branch only)

Local Testing:

# Test the same steps locally
npm ci
npm test -- --coverage --watchAll=false
npm run build
npm run docker:build
npm run docker:run

The workflow uses Docker for consistent containerization across all environments.