---
id: isNull
title: isNull
---

# Function: isNull()

```ts
function isNull(value): BasicExpression<boolean>;
```

Defined in: [packages/db/src/query/builder/functions.ts:233](https://github.com/TanStack/db/blob/main/packages/db/src/query/builder/functions.ts#L233)

## Parameters

### value

`any`

## Returns

[`BasicExpression`](../@tanstack/namespaces/IR/type-aliases/BasicExpression.md)\<`boolean`\>