puppeteer/website/versioned_docs/version-19.8.1/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?](./puppeteer.customqueryhandler.queryall.md) | | (node: Node, selector: string) =&gt; Iterable&lt;Node&gt; | _(Optional)_ | |
| [queryOne?](./puppeteer.customqueryhandler.queryone.md) | | (node: Node, selector: string) =&gt; Node \| null | _(Optional)_ | |