use-named-state

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use-named-state

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React hook to use named state for easier debugging with almost no code change

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# use-named-state

React hook to use named state for easier debugging with almost no code change  
![npm](https://img.shields.io/npm/dm/use-named-state) ![npm bundle size](https://img.shields.io/bundlephobia/min/use-named-state) ![npm](https://img.shields.io/npm/v/use-named-state) ![dependencies](https://img.shields.io/badge/dependencies-0-brightgreen) [![Unit test](https://github.com/bhumijgupta/use-named-state/actions/workflows/test.yaml/badge.svg)](https://github.com/bhumijgupta/use-named-state/actions/workflows/test.yaml)

## Install

```bash
# Using npm
npm i -S use-named-state
# Using yarn
yarn add use-named-state
```

## Motivation

Most of the time I edit state values directly in react devtools to achieve different state during development. But if there are too many states in a functional component, it gets tricky to know which state is what since they are represented without names in devtools. This is a way to solve that problem by naming the states.

| Before                         | After                        |
| ------------------------------ | ---------------------------- |
| ![Before](https://raw.githubusercontent.com/bhumijgupta/use-named-state/master/assets/before.png) | ![After](https://raw.githubusercontent.com/bhumijgupta/use-named-state/master/assets/after.png) |

## Available hooks

1. `useDebugState()` - Recommended  
    It uses [useDebugValue](https://reactjs.org/docs/hooks-reference.html#usedebugvalue) internally to set debug name for the custom hook.

### API

#### **i. StateName is a string**

```typescript
    useDebugState<T>(stateName: string, stateValue:T)
   ```

#### **ii. StateName is a formatter function**

This can be useful if state name needs to be computed or is derived from current state value

```typescript
    useDebugState<T>(stateName: DebugStateFormatter, stateValue:T, extraArgs?: any);
    type DebugStateFormatter<T> = (val: { state: T; extraArgs?: any }) => string;
   ```

**Usage**

```tsx
   import { useDebugState, DebugStateFormatter } from "use-named-state";
   const stateFormatter: DebugStateFormatter<string> = ({
     state,
     extraArgs,
   }) => {
     return `${extraArgs.prefix} ${state}`;
   };
   const extraArgs = { prefix: "The name is" };
   const App = () => {
     // State name is string
     const [counter, setCounter] = useDebugState("counter", 0);
     // State name is a formatter function
     const [name, setName] = useDebugState<string>(
       stateFormatter,
       "John Doe",
       extraArgs
     );
     return (
       <>
         <button onClick={() => setCounter((prevCount) => prevCount + 1)}>
           {counter}
         </button>
         <input onChange={(e) => setName(e.target.value)} value={name} />
       </>
     );
   };
   ```

**Result**  
 ![Output of useDebugState](https://raw.githubusercontent.com/bhumijgupta/use-named-state/master/assets/debugState.png)

2. `useNamedState()`  
   It creates an object with key as state name and value as state.

```typescript
   import { useNamedState } from "use-named-state";
   const App = () => {
     const [counter, setCounter] = useNamedState("counter", 0);

return <button onClick={(prevCount) => prevCount + 1}>{counter}</button>;
   };
   ```

**Result**  
   ![Output of useNamedState](https://raw.githubusercontent.com/bhumijgupta/use-named-state/master/assets/namedState.png)

## Difference

If you use `useDebugState`, the state name is not leaked to the production build.  
If you use `useNamedState`, the state names are leaked to the production build as well, as the state name is the part of state and not just a label. **This might not be an intended side-effect**

## Build with ♡ by

### Bhumij Gupta

![GitHub followers](https://img.shields.io/github/followers/bhumijgupta?label=Follow&style=social) [![LinkedIn](https://img.shields.io/static/v1.svg?label=connect&message=@bhumijgupta&color=success&logo=linkedin&style=flat&logoColor=white)](https://www.linkedin.com/in/bhumijgupta/) ![Twitter Follow](https://img.shields.io/twitter/follow/bhumijgupta?style=social)

---

```javascript
if (repo.isAwesome || repo.isHelpful) {
  StarRepo();
}
```

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