Demon Tech Roadmap

React

React Error Boundaries

Error Boundaries stop the entire application from crashing.

Read Time

5 min read

Difficulty

Beginner

Last Updated

Jun 15, 2026

Version

v1.0.0

Introduction

If a single React component crashes due to a JavaScript error, it usually takes down the whole website, leaving a blank white screen. Error Boundaries catch these crashes locally and show a friendly error message instead of breaking everything.

Example

1/* this uses an error boundary */
2<ErrorBoundary fallback={<p>Something went wrong!</p>}>
3  <ChatWidget />
4</ErrorBoundary>

Key Points

They act like a safety net for your components.
They catch errors anywhere in their child components.
Currently, developers must use Class Components to build them from scratch.
Libraries like `react-error-boundary` provide easier functional alternatives.

Up Next

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