Dev Tools · 1h ago
React Suspense Flicker Fix: How Concurrent Mode Manages Data Fetching
React's Concurrent Mode uses a priority scheduler to handle Suspense boundaries, showing fallback UI immediately while fetching data. Flickering occurs when promises resolve just after the fallback commits. Developers can reduce flicker with delayMs, caching, smaller boundaries, and startTransition.
Meridian48 take
The article offers practical fixes for a common React pain point, but the underlying complexity of Concurrent Mode's scheduler means these solutions may not eliminate flicker entirely in all scenarios.
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Optimizing React Suspense: How Concurrent Mode Handles Data Fetching and Rendering →
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