new_tab_extension (Modular Refactor)

This Chrome extension overrides the New Tab page and provides:

• Search box with selectable engines
• Wallpaper (local + remote sources)
• Shortcuts grid with edit mode, icon editor, drag & drop
• Settings sidebar (persisted via chrome.storage.local)

Project layout

Top-level files:

• newtab.html: New Tab UI markup. Loads scripts in this order:
  1. i18n.js (global i18n compatibility)
  2. script.js (type="module" entry)
• script.js: Thin entry that imports src/app.js
• i18n.js: IIFE-style script that still exports compatibility globals (t, setLanguage, currentLanguage)
• src/style.css: Styling + app-ready gating to prevent FOUC
• manifest.json: Extension configuration

Module code (ES Modules) lives under src/:

• src/app.js: App bootstrap; builds ctx, loads storage, applies settings, initializes features
• src/background.js: Service Worker for WebDAV proxying (CORS bypass) and logic
• src/state.js: Central state model and helpers
• src/dom.js: DOM element lookup + DOM-related helpers
• src/constants.js: Shared constants

Features (UI behavior by area):

• src/features/search.js: Search engine + submit behavior
• src/features/settingsPanel.js: Settings sidebar UI + persistence
• src/features/shortcuts.js: Shortcuts grid, edit mode, icon editor, DnD, pagination
• src/features/sidebar.js: Sidebar toggling + layout wiring
• src/features/wallpaper.js: Wallpaper source handling + refresh
• src/features/sync.js: WebDAV synchronization logic (V2 with binary support)

Utilities:

• src/utils/storage.js: Promise wrappers for chrome.storage.*
• src/utils/db.js: IndexedDB wrapper for large asset storage (Wallpapers/Icons)
• src/utils/images.js: Image formatting, compression, and analysis helpers
• src/utils/favicon.js: Favicon URL generators
• src/utils/webdav.js: WebDAV Client implementation

UI glue:

• src/ui/settingsApply.js: Apply persisted settings to CSS vars / DOM

Key design decisions

• Stable entrypoints: newtab.html continues to load script.js, so file moves don’t require HTML changes.
• Compatibility i18n: i18n.js is isolated internally, but keeps globalThis.t / setLanguage for older callers.
• FOUC prevention: UI is hidden until storage-backed settings have been applied (via body.app-ready).
• Icon resilience: When choosing online icons, icons are cached as data: URLs to survive offline reloads.

Development

Load unpacked

1. Open chrome://extensions/
2. Enable Developer mode
3. Click Load unpacked
4. Select this folder

WebDAV Sync Usage

The extension supports syncing settings and assets (wallpapers, shortcut icons) via WebDAV.

1. Open Settings -> Data Sync (WebDAV).
2. Enter your WebDAV Server URL, Username, and Password.
3. Click Check Connection to verify.
4. Use the buttons to sync:
   • Upload: Overwrites remote data with your local data.
   • Download: Overwrites local data with remote data.
   • Merge: Downloads remote data and merges it with local data (Remote settings overwrite local; Shortcuts are combined by URL).

Testing

See TESTING.md.

Notes

• This repo uses ES Modules in the New Tab page context.
• Persisted data is stored in chrome.storage.local.
• Binary assets (Wallpapers/Icons) are stored in IndexedDB.

Support

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