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Version History for SvelteKit

With Version History, you can monitor changes made to each design and easily restore past versions if needed.

Design Editor starter kit showing a professional design editing interface

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Prerequisites#

Before you begin, make sure you have the following:

  • Node.js v22+ and npm installed locally – Download Node.js
  • A supported browser – Chrome 114+, Edge 114+, Firefox 115+, Safari 15.6+
    See Browser Support for the full list.
New Project
Existing Project

Get Started#

Start fresh with a standalone Version History project. This creates a complete, ready-to-run React application with snapshot functionality.

Step 1: Clone the Repository#

Terminal 
git clone https://github.com/imgly/starterkit-version-history-react-web.git
git clone https://github.com/imgly/starterkit-version-history-react-web.git

The src/ folder contains the editor code:

src/
├── app/                          # Demo application
├── imgly/
│   ├── config/
│   │   ├── actions.ts                # Export/import actions
│   │   ├── features.ts               # Feature toggles
│   │   ├── i18n.ts                   # Translations
│   │   ├── plugin.ts                 # Main configuration plugin
│   │   ├── settings.ts               # Engine settings
│   │   └── ui/
│   │       ├── canvas.ts                 # Canvas configuration
│   │       ├── components.ts             # Custom component registration
│   │       ├── dock.ts                   # Dock layout configuration
│   │       ├── index.ts                  # Combines UI customization exports
│   │       ├── inspectorBar.ts           # Inspector bar layout
│   │       ├── navigationBar.ts          # Navigation bar layout
│   │       └── panel.ts                  # Panel configuration
│   ├── history.ts                # Version history management
│   ├── index.ts                  # Editor initialization function
│   ├── snapshots.ts              # Snapshot management
│   └── utils.ts                  # Utility functions
└── index.tsx                 # Application entry point

Step 2: Install Dependencies#

Install the required packages:

Terminal 
cd starterkit-version-history-react-web
npm install
cd starterkit-version-history-react-web
npm install

Step 3: Download Assets#

CE.SDK requires engine assets (fonts, icons, UI elements) to function. These must be served as static files from your project’s public/ directory.

Terminal 
curl -O https://cdn.img.ly/packages/imgly/cesdk-js/1.80.0/imgly-assets.zip
unzip imgly-assets.zip -d public/
rm imgly-assets.zip
curl -O https://cdn.img.ly/packages/imgly/cesdk-js/1.80.0/imgly-assets.zip
unzip imgly-assets.zip -d public/
rm imgly-assets.zip
src/app/App.tsx
const config = {
  // ...
  baseURL: '/assets'
  // ...
};

Step 4: Run the Development Server#

Terminal 
npm run dev
npm run dev

Open http://localhost:5173 in your browser.

How Version History Works#

The Version History starter kit extends CE.SDK with snapshot functionality, enabling users to save and restore design states. The imgly/ module handles editor configuration while your React component manages snapshot state through the onSave callback.

The onSave Callback#

The initVersionHistoryEditor function accepts an onSave callback that’s invoked when users click “Save Snapshot”. This callback receives the serialized scene string and lets you handle snapshot creation in your application:

src/lib/imgly/index.ts
// Register the saveScene action that calls the onSave callback
cesdk.actions.register('saveScene', async () => {
  const sceneString = await cesdk.engine.scene.saveToString();
  await onSave(sceneString);
});

The callback-based approach keeps snapshot state management in your React component, making it easy to integrate with your existing state management solution (useState, Redux, Zustand, etc.).

Creating Snapshots#

The createSnapshot function generates a thumbnail and blob URLs for the snapshot data:

src/lib/imgly/history.ts
export async function createSnapshot(
  cesdk: CreativeEditorSDK,
  sceneString: string
): Promise<{ thumbnailUrl: string; sceneUrl: string }> {
  const engine = cesdk.engine;
  const scene = engine.scene.get();


  if (!scene) {
    throw new Error('No scene available');
  }


  // Generate thumbnail for snapshot preview
  const thumbnailBlob = await engine.block.export(scene, {
    mimeType: 'image/jpeg',
    targetWidth: 168,
    targetHeight: 168
  });
  const thumbnailUrl = URL.createObjectURL(thumbnailBlob);


  // Store scene as blob URL
  const sceneBlob = new Blob([sceneString], { type: 'text/plain' });
  const sceneUrl = URL.createObjectURL(sceneBlob);


  return { thumbnailUrl, sceneUrl };
}

Set Up a Scene#

CE.SDK offers multiple ways to load content into the editor. Choose the method that matches your use case:

src/lib/imgly/index.ts
// Create a blank design canvas - starts with an empty design scene
await cesdk.actions.run('scene.create');


// Load from a template archive - restores a previously saved project
await cesdk.load('https://example.com/template.zip');


// Load from an image URL - creates a new scene with the image
await cesdk.createFromImage('https://example.com/image.jpg');


// Load from a scene file - restores a scene from JSON
await cesdk.load('https://example.com/scene.json');

The createDesignScene() method is ideal for design workflows, as it creates a blank canvas ready for content.

Customize Assets#

The Version History editor uses asset source plugins to provide built-in libraries for templates, stickers, shapes, and fonts. The starter kit includes a curated selection—customize what’s included based on your needs.

Asset sources are added via plugins in the initialization function. Enable or disable individual sources:

src/lib/imgly/index.ts
import {
  FiltersAssetSource,
  StickerAssetSource,
  TextAssetSource,
  VectorShapeAssetSource,
  EffectsAssetSource,
  // ...
} from '@cesdk/cesdk-js/plugins';


// Add only the sources you need
await cesdk.addPlugin(new FiltersAssetSource());
await cesdk.addPlugin(new StickerAssetSource());
await cesdk.addPlugin(new TextAssetSource());
await cesdk.addPlugin(new VectorShapeAssetSource());
await cesdk.addPlugin(new EffectsAssetSource());
// ...

For production deployments, self-hosting assets is required—the IMG.LY CDN is intended for development only. See Serve Assets for downloading assets, configuring baseURL, and excluding unused sources to optimize load times.

Configure Actions#

Actions are functions that handle user interactions like exporting designs, saving scenes, and importing files. CE.SDK provides built-in actions that you can run directly or override with custom implementations.

Key built-in actions:

  • exportDesign – Export the current design to PNG, JPEG, PDF, or other formats
  • saveScene – Save the scene as a JSON string for later editing
  • importScene – Import a previously saved scene (.imgly or .scene)
  • exportScene – Export the scene as an .imgly file, either the scene alone or an archive with all assets
  • uploadFile – Handle file uploads with progress tracking

Use cesdk.actions.run() to execute any action:

// Run a built-in action
await cesdk.actions.run('exportDesign', { mimeType: 'image/png' });

Import from File Picker#

src/lib/imgly/config/plugin.ts
// Let users open images from their device
cesdk.actions.register('importImage', async () => {
  const blobURL = await cesdk.utils.loadFile({
    accept: 'image/*',
    returnType: 'objectURL'
  });
  await cesdk.createFromImage(blobURL);
});

Export and Save#

src/lib/imgly/config/plugin.ts
// Register export action that downloads the edited design
cesdk.actions.register('exportDesign', async (exportOptions) => {
  const { blobs, options } = await cesdk.utils.export(exportOptions);
  await cesdk.utils.downloadFile(blobs[0], options.mimeType);
});

Upload to Your Backend#

src/lib/imgly/config/plugin.ts
// Override the built-in exportDesign action to send to your server
cesdk.actions.register('exportDesign', async (exportOptions) => {
  const { blobs } = await cesdk.utils.export(exportOptions);


  const formData = new FormData();
  formData.append('design', blobs[0], 'design.png');


  const response = await fetch('/api/upload', {
    method: 'POST',
    body: formData
  });


  const { url } = await response.json();
  console.log('Uploaded to:', url);
});

Customize (Optional)#

Theming#

CE.SDK supports light and dark themes out of the box, plus automatic system preference detection. Switch between themes programmatically:

src/lib/imgly/config/plugin.ts
// 'light' | 'dark' | 'system' | (() => 'light' | 'dark')
cesdk.ui.setTheme('dark');

See Theming for custom color schemes, CSS variables, and advanced styling options.

Localization#

Customize UI labels and add support for multiple languages. The i18n system supports translation keys for all UI elements:

src/lib/imgly/config/plugin.ts
// Override specific labels
cesdk.i18n.setTranslations({
  en: {
    'actions.export.image': 'Download Design',
    'common.cancel': 'Cancel',
    'common.apply': 'Apply'
  }
});


// Add a new language
cesdk.i18n.setTranslations({
  de: {
    'actions.export.image': 'Design herunterladen'
  }
});


// Set the active locale
cesdk.i18n.setLocale('de');

See Localization for supported languages, translation key reference, and right-to-left language support.

UI Layout#

CE.SDK Editor UI Areas

Customize the editor interface by modifying the dock, inspector bar, navigation bar, and canvas menu. CE.SDK provides Order APIs to control which components appear and in what sequence.

src/lib/imgly/config/plugin.ts
// Get current navigation bar components
const navOrder = cesdk.ui.getNavigationBarOrder();


// Add a custom button to the navigation bar
cesdk.ui.insertNavigationBarOrderComponent(
  'ly.img.spacer',
  { id: 'my-custom-action' },
  'after'
);


// Rearrange dock items
cesdk.ui.setDockOrder([
  'ly.img.assetLibrary.dock',
  'ly.img.separator',
  'my-custom-dock-item'
]);


// Customize the inspector bar
cesdk.ui.setInspectorBarOrder([
  'ly.img.fill.inspectorBar',
  'ly.img.separator',
  'ly.img.filter.inspectorBar'
]);

The Order API methods follow a consistent pattern across all UI areas:

  • get*Order() – Retrieve the current component order
  • set*Order() – Replace the entire order
  • insert*OrderComponent() – Add components relative to existing ones

See Dock, Inspector Bar, Navigation Bar, Canvas Menu, and Canvas for detailed layout customization options.

Custom Components#

Build custom UI components using the builder system and integrate them in the editor. Custom components receive reactive state updates and can interact with the engine API.

src/lib/imgly/config/plugin.ts
// Register a custom component
cesdk.ui.registerComponent('my-custom-button', ({ builder, engine }) => {
  const selectedBlocks = engine.block.findAllSelected();


  builder.Button('apply-effect', {
    label: 'Apply Effect',
    isDisabled: selectedBlocks.length === 0,
    onClick: () => {
      // Apply custom logic to selected blocks
    }
  });
});


// Add the component to the navigation bar
cesdk.ui.insertNavigationBarOrderComponent(
  'ly.img.spacer',
  'my-custom-button',
  'after'
);

Custom components automatically re-render when the engine state they depend on changes—no manual subscription management required.

See Register New Component for the complete builder API and component patterns.

Settings & Features#

Fine-tune editor behavior through settings and features.

Settings configure core engine behavior—rendering, input handling, and history management:

src/lib/imgly/config/plugin.ts
cesdk.engine.editor.setSettingBool('page/dimOutOfPageAreas', true);
cesdk.engine.editor.setSettingBool('mouse/enableZoomControl', true);
cesdk.engine.editor.setSettingBool('features/undoHistory', true);

Features toggle which editing tools and panels appear in the UI:

src/lib/imgly/config/plugin.ts
// Toggle editor features
cesdk.feature.enable('ly.img.crop', true);
cesdk.feature.enable('ly.img.filter', true);
cesdk.feature.enable('ly.img.adjustment', true);

See Settings and Features for the complete reference.

Explore Plugins#

CE.SDK has a rich plugin ecosystem that extends the editor with powerful capabilities. Plugins can add new features, integrate third-party services, or customize editor behavior.

Background Removal#

Add AI-powered background removal that runs entirely client-side. The background removal plugin processes images directly in the browser without sending data to external servers.

src/lib/imgly/config/plugin.ts
import BackgroundRemovalPlugin from '@imgly/plugin-background-removal';


// Add background removal capability
await cesdk.addPlugin(BackgroundRemovalPlugin());

See Background Removal for setup instructions and configuration options.

Export print-ready PDF/X-4 and PDF/X-3 files with CMYK color profiles for professional printing workflows.

src/lib/imgly/config/plugin.ts
import PrintReadyPDFPlugin from '@imgly/plugin-print-ready-pdf';


// Add print-ready PDF export capability
await cesdk.addPlugin(PrintReadyPDFPlugin());

See Print Ready PDF for setup instructions and configuration options.

AI Integration#

Extend the editor with generative AI capabilities for text-to-image generation, image enhancement, and intelligent editing features. CE.SDK integrates with various AI providers.

src/lib/imgly/config/plugin.ts
import AIPlugin from '@imgly/plugin-ai-generation';


// Configure AI generation
await cesdk.addPlugin(AIPlugin({
  provider: 'your-ai-provider',
  apiKey: 'your-api-key'
}));

See AI Integration for provider setup and supported AI features.

Custom Asset Sources#

Connect external asset libraries like Unsplash, Getty Images, or your own content management system. Asset sources let users browse and insert content from any source.

src/lib/imgly/config/plugin.ts
import UnsplashAssetSource from '@imgly/plugin-unsplash';


// Add Unsplash integration
await cesdk.addPlugin(UnsplashAssetSource({
  accessKey: 'your-unsplash-access-key'
}));

See Custom Asset Sources for integration patterns.

Discover More Plugins#

Explore the full plugin ecosystem in the IMG.LY plugins repository. Available plugins include:

  • Vectorizer – Convert raster images to vectors
  • Design Presets – Pre-built design templates
  • Social Media Templates – Platform-specific sizing
  • And more – Check the repository for the latest additions

Key Capabilities#

The Version History editor provides essential versioning features for design workflows.

Snapshot Save/Load

Snapshot Save/Load

Save design states as snapshots and restore any previous version with a single click.

Thumbnail Previews

Thumbnail Previews

Each snapshot displays a visual thumbnail for easy identification of design versions.

User Attribution

User Attribution

Track who created each snapshot with timestamps for collaborative workflows.

Client-Side Storage

Client-Side Storage

All snapshot data is stored locally in the browser—no server required.

Multi-Page Support

Multi-Page Support

Full scene state including all pages is captured and restored in each snapshot.

React Integration

React Integration

Built with React hooks for seamless integration into modern React applications.


Troubleshooting#

Editor doesn’t load#

  • Check the container element exists: Ensure your container element is in the DOM before calling create()
  • Verify the baseURL: Assets must be accessible from the CDN or your self-hosted location
  • Check console errors: Look for CORS or network errors in browser developer tools

Assets don’t appear#

  • Check network requests: Open DevTools Network tab and look for failed requests to cdn.img.ly
  • Self-host assets for production: See Serve Assets to host assets on your infrastructure

Snapshots don’t appear#

  • Check React state: Ensure snapshots state is correctly wired to your UI components
  • Verify onSave callback: Check that the callback is correctly configured in the editor config

Thumbnails are blank#

  • Wait for content to load: Ensure the scene has finished rendering before creating thumbnails
  • Check scene exists: Verify the scene is available before calling createSnapshot

Export fails or produces blank images#

  • Wait for content to load: Ensure images are fully loaded before exporting
  • Check CORS on images: Remote images must allow cross-origin access

Watermark appears in production#

  • Add your license key: Set the license property in your configuration
  • Sign up for a trial: Get a free trial license at img.ly/forms/free-trial

Next Steps#

  • Configuration – Complete list of initialization options
  • Serve Assets – Self-host engine assets for production
  • Actions – Build custom export and save workflows
  • Theming – Customize colors and appearance
  • Localization – Add translations and language support