Added Blog Post React custom hook when to use

Author: oguzhanagir

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+**Title:** When Are Custom Hooks an Advantage in React, and When Do They Become a Liability?
+**Description:** A practical guide to React custom hooks explaining when abstraction improves readability and reuse and when it introduces unnecessary complexity and maintenance risk.
+
+# When Are Custom Hooks an Advantage in React, and When Do They Become a Liability?
+
+In React, custom hooks when used correctly are tools that reduce code duplication, improve readability, and simplify complex logic. However, in many projects, after a certain point, the following statements start to appear:
+
+* What exactly does this hook do?
+* Why is changing this hook so risky?
+* Why do I need to look at three hooks for a simple change?
+
+At this point, the problem is usually not React itself, but **incorrect abstraction of custom hooks**.
+
+In this article, we’ll examine when custom hooks truly add value, when they become a burden, and how to strike the right balance.
+
+## What Is the Real Purpose of Custom Hooks?
+
+Let’s clarify the core purpose first. Custom hooks exist to:
+
+* Share repeated logic
+* Make components more readable
+* Isolate state and behavior that are independent of the UI
+
+In other words, the goal is:
+
+> **Code sharing + readability + clear responsibility**
+
+If a custom hook does not provide at least one of these, it should be questioned.
+
+## Unnecessary Abstraction
+
+One of the most common issues is creating abstractions before repetition actually exists.
+
+### Example of premature abstraction
+
+```tsx
+const useInput = (initialValue: string) => {
+  const [value, setValue] = useState(initialValue);
+
+  const onChange = (e) => setValue(e.target.value);
+
+  return { value, onChange };
+};
+```
+
+At first glance, this may seem reasonable. But if the project has only a single input:
+
+* The code does not get shorter
+* Readability does not improve
+* The hook creates additional cognitive load
+
+At this point, the hook becomes an extra layer rather than a solution.
+
+### A simpler alternative
+
+```tsx
+const [value, setValue] = useState("");
+```
+
+**Core principle:** If a piece of logic is not truly used in **at least two different places**, writing a custom hook is often a premature decision.
+
+## Over Generalized Hooks
+
+Another common problem is over generalizing hooks with the idea that “we’ll use this everywhere later.”
+
+### A hook that grows over time
+
+```tsx
+const useFetch = ({
+  url,
+  method,
+  headers,
+  body,
+  autoFetch,
+  onSuccess,
+  onError,
+}) => {
+  // too many conditions
+};
+```
+
+Initially, this hook may look powerful. But over time:
+
+* The number of parameters increases
+* Its behavior becomes harder to predict
+* A small change affects many places
+
+As a result:
+
+* Even if the hook is reusable
+* Readability decreases
+* The cost of change increases
+
+### A healthier approach
+
+Designing hooks with a narrow scope:
+
+```tsx
+const useUser = (userId) => {
+  const [user, setUser] = useState(null);
+
+  useEffect(() => {
+    fetchUser(userId).then(setUser);
+  }, [userId]);
+
+  return user;
+};
+```
+
+This hook:
+
+* Has a clear responsibility
+* Is easy to understand
+* Is safer to modify
+
+## Readability vs. Reusability
+
+This is the most critical balance point with custom hooks. Not every reusable piece of code is automatically better code.
+
+### Usage that hurts readability
+
+```tsx
+const {
+  state,
+  handlers,
+  computed,
+  flags
+} = useComplexFormLogic();
+```
+
+For someone reading this code:
+
+* What the hook does is unclear
+* Where the state comes from and what each handler affects is not obvious
+* Debugging takes longer
+
+### A readability first approach
+
+```tsx
+const form = useLoginForm();
+```
+
+or
+
+```tsx
+const { email, password, isValid, submit } = useLoginForm();
+```
+
+Here:
+
+* The hook’s purpose is clear
+* The usage remains simple
+* The component clearly communicates its intent
+
+## Custom Hooks That Hide Components
+
+Poorly designed hooks can make the flow inside a component invisible.
+
+### Problematic structure
+
+```tsx
+const Component = () => {
+  useMagicHook();
+
+  return <UI />;
+};
+```
+
+Here:
+
+* It’s unclear where state is managed
+* When effects run is uncertain
+* Debugging becomes difficult
+
+### A more transparent approach
+
+```tsx
+const Component = () => {
+  const { data, isLoading } = useUsers();
+
+  if (isLoading) return <Spinner />;
+
+  return <UserList data={data} />;
+};
+```
+
+With this usage:
+
+* Data flow is readable
+* Component behavior is clear
+* The hook supports the component instead of hiding it
+
+## Questions to Ask Before Writing a Custom Hook
+
+Asking the following questions before writing a custom hook can save significant time:
+
+* Will this logic really be used in more than one place?
+* Does this abstraction make the code more readable, or more mysterious?
+* Does the hook have a single, clear responsibility?
+* How many components will be affected if this hook changes?
+
+Often, this single question is enough:
+
+> “Would this code be more understandable if it stayed inside the component?”
+
+## When Are Custom Hooks an Advantage?
+
+Custom hooks create real value when:
+
+* There are complex combinations of state and side effects
+* The same behavior is repeated across multiple components
+* UI independent logic can be extracted
+* Components become simpler as a result
+
+## When Do They Become a Burden?
+
+Custom hooks become a burden when:
+
+* Single use logic is abstracted
+* Overly generalized APIs are created
+* Readability is sacrificed for reusability
+* Debugging becomes harder
+
+In conclusion, custom hooks are one of React’s most powerful abstraction tools. But when used incorrectly, they make code more complex and fragile instead of simpler.
+
+For a healthy approach:
+
+* Avoid premature abstraction
+* Design hooks with narrow, clear responsibilities
+* Prioritize readability over reusability
+
+This leads to more sustainable React projects in the long run.
+
+# You May Want to Take a Look
+
+If you’re working on larger React codebases, having a clear architectural baseline can make abstraction decisions like custom hooks much easier to manage over time.
+
+ASP.NET Zero’s React setup is one example of this approach:
+
+- [https://aspnetzero.com/react](https://aspnetzero.com/react)
+- [https://aspnetzero.com/pricing](https://aspnetzero.com/pricing)