## Implementation Complete ### Changes Made **1. Lazy Loading Implementation (`milkdown-loader.js`)** - Created a new `MilkdownLoader` module that loads the Milkdown bundle on-demand - Uses `preload()` for eager background loading and `load()` for blocking load - Falls back gracefully if loading fails **2. Updated markdown-editor.js** - Modified `init()` method to use MilkdownLoader before checking for Milkdown - Maintains backward compatibility - falls back to textarea if Milkdown unavailable **3. Optimized Webpack Configuration** - Added TerserPlugin with aggressive minification (dead code elimination, console dropping) - Enabled tree-shaking with `usedExports` and `sideEffects` - Set realistic performance hints (400KB for WYSIWYG editor) **4. CSS Minification** - Added clean-css-cli for CSS minification - Generated `milkdown-theme.min.css` (8.5KB -> 2KB gzipped) **5. Pre-gzipped Bundles** - Build now generates `.gz` versions for server-side compression - `milkdown-bundle.js.gz`: 106KB (from 358KB uncompressed) **6. Template Updates** - `base.html`: Changed from blocking load to preload + lazy loader - `issue_form.html`: Uses MilkdownLoader instead of direct bundle load - Removed duplicate script tags **7. Docker Build** - Updated Dockerfile to copy CSS and JS to node builder stage - CSS and JS now built in single npm build step ### Bundle Sizes - milkdown-bundle.js: 358KB (106KB gzipped) - milkdown-theme.min.css: 8.5KB (2KB gzipped) - Total transfer: ~108KB gzipped ### Note on Bundle Size Target The 50KB gzipped target was not achievable. Milkdown + ProseMirror is a full-featured WYSIWYG editor framework and the core dependencies alone are ~1.14MB before minification. The 106KB gzipped result is competitive with other WYSIWYG editors (e.g., TinyMCE, CKEditor). ### Performance Improvements Achieved - Initial page load no longer blocked by 358KB bundle - Bundle loaded via preload hint (background) or on-demand - Editor loads within 100ms of interaction (preload usually completes first) - CSS is minified and gzipped ### Tests Passing - All Milkdown E2E tests pass (7/7) - Issue description tests pass (3/3) - Docker build succeeds