);
}
```
(obviously, immer is a little overkill for this example)
### Managing state as simple useState hook
When passing a value to the updater instead of a function, `useImmer` hook behaves the same as useState hook and updates the state with that value.
```javascript
import React from 'react';
import { useImmer } from 'use-immer';
function BirthDayCelebrator(){
const [age, setAge] = useImmer(20);
function birthDay(event){
setAge(age + 1);
alert(`Happy birthday #${age} Anon! hope you good`);
}
return(
);
}
```
Obviously if you have to deal with immutability it is better option passing a function to the updater instead of a direct value.
## useImmerReducer
Immer powered reducer, based on [`useReducer` hook](https://reactjs.org/docs/hooks-reference.html#usereducer)
Example: https://codesandbox.io/s/2zor1monvp
```javascript
import React from "react";
import { useImmerReducer } from "use-immer";
const initialState = { count: 0 };
function reducer(draft, action) {
switch (action.type) {
case "reset":
return initialState;
case "increment":
return void draft.count++;
case "decrement":
return void draft.count--;
}
}
function Counter() {
const [state, dispatch] = useImmerReducer(reducer, initialState);
return (
<>
Count: {state.count}
);
}
```
---
_Source: https://npm.io/package/use-immer · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._