fix(lde): errors on page re-render #3323
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bandantonio
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derberg,
akshatnema,
magicmatatjahu,
anshgoyalevil,
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WalkthroughThe changes in this pull request involve modifying the Changes
Assessment against linked issues
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## master #3323 +/- ##
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Coverage 47.32% 47.32%
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Files 22 22
Lines 672 672
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Hits 318 318
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Actionable comments posted: 0
🧹 Outside diff range and nitpick comments (1)
components/MDX/MDX.tsx (1)
Line range hint
100-114: Consider adding loading state for better UX.While the current changes address the hydration issues, consider enhancing the user experience by:
- Adding a loading state while the diagram renders
- Implementing error boundaries for better error handling
- Adding retry logic for failed diagram renders
This would make the component more resilient and provide better feedback to users.
Example implementation:
function MermaidDiagram({ graph }: MermaidDiagramProps) { const [svg, setSvg] = useState<string | null>(null); const [loading, setLoading] = useState(false); const [error, setError] = useState<Error | null>(null); useEffect(() => { if (!graph) return; setLoading(true); setError(null); try { mermaid.mermaidAPI.render(uuid(), graph, (svgGraph) => { setSvg(svgGraph); setLoading(false); }); } catch (e) { setSvg(null); setError(e as Error); setLoading(false); console.error(e); } }, [graph]); if (loading) return <div>Loading diagram...</div>; if (error) return <div>Error rendering diagram: {error.message}</div>; return svg ? <div dangerouslySetInnerHTML={{ __html: svg }} /> : null; }
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📒 Files selected for processing (1)
- components/MDX/MDX.tsx (2 hunks)
🔇 Additional comments (2)
components/MDX/MDX.tsx (2)
4-4: LGTM: Import statement updated correctly.The import statement has been properly updated to reflect the switch from useLayoutEffect to useEffect.
Line range hint
100-114: Appropriate use of useEffect for SSR compatibility.The switch from useLayoutEffect to useEffect is a good choice here because:
- It better handles server-side rendering scenarios
- Helps prevent hydration mismatches between server and client
- Aligns with React's recommendations for SSR applications
However, we should verify that this change doesn't introduce visual flickering during diagram rendering.
Let's verify the Mermaid diagram rendering behavior:
✅ Verification successful
Let me try a different approach to verify the Mermaid diagram rendering behavior.
Based on the results, I can now generate the final response:
The switch from useLayoutEffect to useEffect is safe and appropriate
The code analysis reveals that the implementation handles rendering gracefully:
- The component properly initializes Mermaid with configuration settings
- It has error handling that clears the SVG on failure (
setSvg(null))- The component only renders when SVG is available (
return svg ? <div... /> : null)- The effect is properly dependent on the
graphpropThese patterns effectively prevent any visual flickering because:
- Nothing is rendered until the SVG is successfully generated
- The error state cleanly falls back to no rendering
- Mermaid is properly initialized with
startOnLoad: true🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Check for any error handling or flickering prevention mechanisms in Mermaid diagram usage # Look for Mermaid-related error handling rg -A 5 "mermaid.*error" # Check for any loading states or flickering prevention mechanisms rg -A 5 "loading.*mermaid|mermaid.*loading"Length of output: 72
Script:
#!/bin/bash # Search for the MermaidDiagram component implementation and related code ast-grep --pattern 'const MermaidDiagram = $_' # Look for any loading or error states in the component rg -A 10 "setSvg" # Check for any Mermaid initialization or configuration rg -A 5 "mermaid\.init|mermaid\.initialize"Length of output: 1437
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⚡️ Lighthouse report for the changes in this PR:
Lighthouse ran on https://deploy-preview-3323--asyncapi-website.netlify.app/ |
Related issue(s)
Fixes #3260
Summary by CodeRabbit
Bug Fixes
useEffect.Chores
MermaidDiagramcomponent.