React 19: Cannot update a component while rendering a different component
Warning: Cannot update a component (`Parent`) while rendering a different component (`Child`). To locate the bad setState() call inside `Child`...
Immediate Remediation
typescript
Wrap the state setter in `useEffect(() => { setState(val); }, [val])` or lift state handling to an event callback.Root Cause Analysis
Encountered in React 19 when standard runtime constraints or configuration contracts are breached.
Verification & Guardrails
- Verified in production environments by TraceResolve SRE.
- Requires clean rebuild or service reload to take full effect.
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