Added PWA, Accessibility, Confetti, Clear/Retry & Modular JS

[Galaxicitti]

🛠️ What was changed:

This PR transforms the Quick Fact Checker from a basic prototype into a production-ready, accessible, and feature-rich web application. Key enhancements include:

✅ Core Architecture & Maintainability

• Refactored entire JavaScript into an IIFE (Immediately Invoked Function Expression) to prevent global pollution and improve modularity.
• Introduced CONFIG and STRINGS constants for easy configuration and future internationalization (i18n).
• Adopted a modular function structure (init(), bindEvents(), etc.) for better code organization.

🎨 UI/UX Enhancements

• Added Clear Button (✖️) inside the textarea that appears when text is present.
• Implemented Retry Button that re-triggers analysis when an error occurs.
• Added Confetti Animation (Canvas-based) that triggers on TRUE results for celebratory feedback.
• Improved Textarea Auto-Resize with debounce for smoother performance.
• Added Character Limit Warning (1000 characters) with toast notification and button disable.
• Enhanced button states, loading animations, and scroll-to-result behavior.

♿ Accessibility (a11y) Upgrades

• Added comprehensive ARIA attributes (aria-label, aria-live, aria-atomic, role, aria-describedby).
• Implemented keyboard navigation for history toggle (Enter/Space) and global Escape key to collapse history.
• Added tabindex to interactive elements and improved focus management.
• Form now uses novalidate with manual validation for better control.

📱 PWA & SEO Readiness

• Added full PWA manifest.json (dynamically generated for demo).
• Registered a mock Service Worker for offline capability demonstration.
• Included SEO meta tags: description, canonical, Open Graph, and Twitter Card for social sharing.

🔄 Enhanced History System

• Added “Copy to Input” button (📋) on each history item to reload past text with one click.
• Implemented lazy rendering of history items (only renders when expanded) for performance.
• Added ARIA aria-expanded state to history header for screen readers.

🧪 Validation & Error Handling

• Added empty input validation with user-friendly toast message.
• Added character limit validation (1000 chars) with visual feedback.
• Improved error state UI with retry functionality.

🚀 Performance Optimizations

• Debounced textarea resize and character count updates.
• Used will-change CSS property on animated elements for GPU optimization.
• Canvas-based confetti avoids DOM performance issues.

🌐 Internationalization (i18n) Ready

• All user-facing strings moved to STRINGS object with functions for pluralization (e.g., “1 character” vs “10 characters”).
• Easy to translate by swapping out the STRINGS object.

📁 Files Modified:

• index.html → Added SEO/PWA meta tags, ARIA attributes, new buttons, canvas element, and updated structure.
• style.css → Added new classes (.clear-btn, .retry-btn), updated animations, and responsive tweaks.
• script.js → Complete rewrite using IIFE, modular functions, CONFIG, and STRINGS.

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🌍 Impact:

• ✅ User Experience: More intuitive, delightful (confetti!), and forgiving (retry, clear, validation).
• ✅ Accessibility: Fully navigable by keyboard and screen reader friendly — meets WCAG standards.
• ✅ Maintainability: Code is now modular, configurable, and ready for team collaboration or future features.
• ✅ Performance: Optimized animations and lazy rendering ensure smooth experience even on low-end devices.
• ✅ Deployability: Ready to be deployed as a PWA or embedded in larger applications.

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🧪 How to test:

1. Clone & Run:

   git checkout <your-branch-name>
   open index.html

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Project	Deployment	Preview	Comments	Updated (UTC)
quick-fact-checker	Ready	Preview	Comment	Sep 23, 2025 6:59pm

[Deepika14145]

Thank you @Galaxicitti, for your contribution!