Question 1

What is the exhaustive-deps warning in React?

Accepted Answer

The exhaustive-deps warning is an ESLint rule provided by the official React hooks plugin. It detects when you are using a variable inside a hook (like useEffect) that is not included in your dependency array.

This is a critical safeguard because omitting dependencies can lead to stale data, bugs, or inconsistent UI states. The warning ensures that your hook always has the latest values it needs to perform its logic accurately.

Question 2

Why does my code trigger an infinite loop when I add dependencies?

Accepted Answer

Adding a function or an object to a dependency array often triggers an infinite loop if that variable is recreated on every render. Because the dependency array performs a shallow comparison, a new object reference causes the effect to re-run, which in turn might cause a state update, causing a re-render and a new object reference.

To resolve this, use the useCallback or useMemo hooks to memoize the function or object. This ensures the reference remains stable across renders unless its own dependencies change, preventing unnecessary effect execution.

Question 3

Is this tool safe for analyzing proprietary code?

Accepted Answer

Yes, this tool is designed with privacy and security as the top priority. All processing happens locally within your browser's memory, meaning your code is never sent to a server, stored in a database, or shared with third parties.

Because the tool is a completely self-contained browser-based application, you can safely paste your snippets for analysis without worrying about data leaks or privacy violations in your development workflow.

Question 4

Can I use this for custom hooks as well?

Accepted Answer

Absolutely. This tool is designed to parse any JavaScript or TypeScript code structure commonly used in modern component-based frameworks. While it excels at standard hooks like useEffect and useMemo, it provides actionable insights into how data flows through any function.

By highlighting dependencies and missing variables, it helps you structure your custom hooks efficiently, leading to cleaner codebases and fewer runtime performance issues in your web applications.

Free React Hooks Exhaustive Deps Debugger & Code Fixer