puppeteer/website/versioned_docs/version-20.7.0/api/puppeteer.customqueryhandler.md
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---
sidebar_label: CustomQueryHandler
---
# CustomQueryHandler interface
#### Signature:
```typescript
export interface CustomQueryHandler
```
## Properties
| Property | Modifiers | Type | Description | Default |
| -------- | --------------------- | --------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
| queryAll | <code>optional</code> | (node: Node, selector: string) =&gt; Iterable&lt;Node&gt; | Searches for some [Nodes](https://developer.mozilla.org/en-US/docs/Web/API/Node) matching the given <code>selector</code> from [node](https://developer.mozilla.org/en-US/docs/Web/API/Node). | |
| queryOne | <code>optional</code> | (node: Node, selector: string) =&gt; Node \| null | Searches for a [Node](https://developer.mozilla.org/en-US/docs/Web/API/Node) matching the given <code>selector</code> from [node](https://developer.mozilla.org/en-US/docs/Web/API/Node). | |