Add markdown preview image lazy loading #411
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (2)
frontend/package.json (1)
58-58: Consider pinning the version for better dependency control.The addition of
markdown-it-image-lazy-loadingaligns well with the project's markdown processing ecosystem. However, consider pinning the exact version (removing the^) to ensure consistent builds and prevent unexpected updates.- "markdown-it-image-lazy-loading": "^2.0.1", + "markdown-it-image-lazy-loading": "2.0.1",frontend/src/components/editor/Preview.tsx (1)
52-52: Consider enhancing the lazy loading implementationWhile the basic implementation works, consider these improvements:
- Add loading state indicators for images
- Implement fallback handling for failed image loads
- Configure loading behavior (e.g., loading offset, placeholder images)
Example configuration:
.use(markdownItImageLazyLoading, { loadingClassName: 'image-loading', loadingIndicator: true, errorClassName: 'image-error', rootMargin: '50px 0px', threshold: 0.1 });
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pnpm-lock.yamlis excluded by!**/pnpm-lock.yaml
📒 Files selected for processing (3)
frontend/package.json(1 hunks)frontend/src/components/editor/Preview.tsx(2 hunks)frontend/src/global.d.ts(1 hunks)
✅ Files skipped from review due to trivial changes (1)
- frontend/src/global.d.ts
🔇 Additional comments (4)
frontend/package.json (1)
58-58: Verify package security and maintenance status.
Before merging, please ensure:
- The package has been vetted for security vulnerabilities
- It has healthy download statistics on npm
- It's actively maintained and compatible with markdown-it v14.1.0
- The impact on bundle size is acceptable
frontend/src/components/editor/Preview.tsx (3)
14-14: LGTM: Import statement is properly placed and follows conventions
The import statement for the lazy loading plugin is correctly positioned with other markdown-it related imports.
51-52: Verify plugin ordering with sanitizer
The lazy loading plugin is added after the sanitizer plugin. While this works, please verify that this ordering doesn't bypass any sanitization rules. Consider if the lazy loading plugin should run before sanitization to ensure all generated HTML is properly sanitized.
51-52: Verify lazy loading behavior with various content scenarios
Please ensure testing covers:
- Long documents with multiple images
- Images of varying sizes
- Images with different loading times
- Network throttling scenarios
- Mobile device behavior
What this PR does / why we need it:
Which issue(s) this PR fixes:
Fixes #
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Does this PR introduce a user-facing change?:
Additional documentation:
Checklist:
Summary by CodeRabbit
markdown-it-image-lazy-loadingto improve image handling in the editor.