React Error Boundary Patterns FAQs

Question 1

Where should I place my Error Boundaries?

Accepted Answer

You should place boundaries strategically around major features or components that are likely to fail. Granular boundaries are preferred over a single root boundary so that a failure in one section doesn't crash the entire app.

Question 2

Does this skill support the latest React features?

Accepted Answer

Yes, it specifically includes patterns for React 19's createRoot options, including onCaughtError, onUncaughtError, and onRecoverableError for centralized error management.

Question 3

Can error boundaries catch errors in event handlers?

Accepted Answer

No, error boundaries only catch errors during rendering, in lifecycle methods, and in constructors. To catch errors in event handlers or async code, use try/catch or the showBoundary hook from the react-error-boundary library.

Question 4

How do I make my fallback UI accessible?

Accepted Answer

Always use the role='alert' attribute on your fallback UI container to ensure screen readers immediately announce the error to the user.

Question 5

What is the difference between getDerivedStateFromError and componentDidCatch?

Accepted Answer

getDerivedStateFromError is a static method used to update state and render a fallback UI during the render phase. componentDidCatch is used for side effects, such as logging the error to a service, during the commit phase.

React Error Boundary Patterns

主な機能

ユースケース

React Error Boundary Patterns

主な機能

ユースケース