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# `useUpsert`
> DEPRECATED!
> Use `useList` hook's upsert action instead
Superset of [`useList`](./useList.md). Provides an additional method to upsert (update or insert) an element into the list.
## Usage
```jsx
import {useUpsert} from 'react-use';
const Demo = () => {
const comparisonFunction = (a: DemoType, b: DemoType) => {
return a.id === b.id;
};
const [list, { set, upsert, remove }] = useUpsert(comparisonFunction, initialItems);
return (
<div style={{ display: 'inline-flex', flexDirection: 'column' }}>
{list.map((item: DemoType, index: number) => (
<div key={item.id}>
<input value={item.text} onChange={e => upsert({ ...item, text: e.target.value })} />
<button onClick={() => remove(index)}>Remove</button>
</div>
))}
<button onClick={() => upsert({ id: (list.length + 1).toString(), text: '' })}>Add item</button>
<button onClick={() => set([])}>Reset</button>
</div>
);
};
```
## Related hooks
- [useList](./useList.md)
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