All development environments now have access to the 46 contract templates (41 ContractTemplates + 5 SandboxTemplates):
| Component | Template Access | Status |
|---|---|---|
ContractPlayground (/ide) |
✅ Full 41 templates | Was already integrated |
| InteractiveSandbox | ✅ Full 46 templates | Updated - now shows both workspace and contract templates |
| SoliditySandbox | ✅ Full 41 templates | NEW - Added template browser |
InteractiveLearningPlayground (/learn) |
✅ Full 46 templates | NEW - Added Templates button |
FullStackDemoPage (/fullstack-demo) |
✅ Full 46 templates | NEW - Added Load Template button |
| WebSandbox | N/A | HTML/CSS/JS focused (no contract templates) |
- Tokens: 8 templates (ERC-20, ERC-20 Advanced, Wrapped, Capped, Reflection, Permit)
- NFTs: 9 templates (ERC-721, ERC-1155, Enumerable, Royalties, Soulbound, Lazy Minting)
- DeFi: 10 templates (Lending, Yield Farming, Staking, Liquidity Pool, Flash Loans, Vaults)
- DAO: 2 templates (Governance, Timelock Controller)
- Security: 6 templates (Reentrancy Guard, Role-Based Access, Pausable, Ownable, MultiSig)
- Utilities: 6 templates (Simple Storage, Counter, Hello World, Payment Splitter, Escrow, Airdrop)
During a codebase review, we identified several features that were not properly documented or accessible from the main navigation:
| Feature | Status | Was Accessible? | Now Documented? |
|---|---|---|---|
| WebSandbox | Production | No nav link | ✅ docs/IDE_GUIDE.md |
| SoliditySandbox | Production | No nav link | ✅ docs/IDE_GUIDE.md |
| AI Code Whisperer | Experimental | Innovation Mode only | ✅ docs/INNOVATION_LAB.md |
| Contract Time Machine | Experimental | Innovation Mode only | ✅ docs/INNOVATION_LAB.md |
| Security Testing Lab | Experimental | Innovation Mode only | ✅ docs/INNOVATION_LAB.md |
| Collaborative Arena | Experimental | Innovation Mode only | ✅ docs/INNOVATION_LAB.md |
| Neural Gas Oracle | Experimental | Innovation Mode only | ✅ docs/INNOVATION_LAB.md |
| Cross-Chain Deployer | Experimental | Innovation Mode only | ✅ docs/INNOVATION_LAB.md |
| Learning Playground | Production | No nav link | ✅ docs/PLAYGROUNDS.md |
| Full-Stack Demo | Production | No nav link | ✅ docs/PLAYGROUNDS.md |
- CRITICAL: Update NavBar to include
/idelink (Dev Tools dropdown added) - Add dropdown menu for "Dev Tools" with all environments
- Add Innovation Lab link to navigation
- Update mobile bottom nav (IDE link added)
- Add feature cards on homepage showcasing tools
- ErrorBoundary: Added global error boundary component with user-friendly error UI
- Lazy Loading: Implemented React.lazy() code splitting for 20+ page components
- Loading States: Created comprehensive skeleton loaders and spinners library
- useAsync Hook: Added enterprise-grade async operation hook with retry support
- useLocalStorage Hook: Added type-safe localStorage/sessionStorage hooks
- Test Utilities: Created comprehensive test utilities with mock providers
- ErrorBoundary Tests: Added full test coverage for ErrorBoundary component
| Document | Content |
|---|---|
docs/IDE_GUIDE.md |
All IDEs and sandboxes with URLs |
docs/INNOVATION_LAB.md |
All experimental AI features |
docs/PLAYGROUNDS.md |
All playground components |
Short answer: No, not fully. GitHub (and most markdown renderers) strip out:
<style>tags<script>tags- Most interactive elements
- Custom CSS styling
This is for security reasons (XSS prevention).
| Approach | How |
|---|---|
| Screenshot/GIF | Take a screenshot or animated GIF of your widget and embed it with  |
| Live Demo Badge | Add a badge linking to a live demo: [](https://your-demo-url.com) |
| CodePen/CodeSandbox Link | Create the widget on CodePen and link to it |
| GitHub Pages | Host a live preview on GitHub Pages and link to it |
## Widget Preview

▶️ [Try Live Demo](https://your-demo.vercel.app) | 🖊️ [Edit on CodePen](https://codepen.io/...)Short answer: No, you cannot embed an interactive CodePen-like sandbox directly in a README.
GitHub doesn't support iframes or embedded editors in markdown files.
| Solution | Description |
|---|---|
| "Open in CodeSandbox" button | [](https://codesandbox.io/s/github/your-repo) |
| "Open in StackBlitz" button | [](https://stackblitz.com/github/your-repo) |
| GitHub Codespaces | Add a "Open in Codespaces" button |
| Replit badge | Link to a Replit with your code |
## 🎮 Try It Out
[](https://stackblitz.com/github/nirholas/free-crypto-news)
[](https://codesandbox.io/s/github/nirholas/free-crypto-news)
Or copy the widget code and paste it into [CodePen](https://codepen.io/pen/) to experiment!For the crypto news widget, recommended approach:
- Create a CodePen with the exact HTML
- Take a screenshot of the widget
- Add to README:
## 📦 Embeddable Widget

<details>
<summary>📋 Copy Widget Code</summary>
\`\`\`html
<!-- Your full HTML here -->
\`\`\`
</details>
🔗 [Live Preview](https://codepen.io/...) • [Edit on CodePen](https://codepen.io/.../edit)- Create CodePen with widget code
- Take screenshot/GIF of widget
- Add "Open in StackBlitz/CodeSandbox" badges to README
- Set up GitHub Pages for live preview (optional)
- Add widget preview image to docs/images/