21 lines
1.2 KiB
Markdown
21 lines
1.2 KiB
Markdown
---
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sidebar_label: CustomQueryHandler
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---
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# CustomQueryHandler interface
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Contains two functions `queryOne` and `queryAll` that can be [registered](./puppeteer.registercustomqueryhandler.md) as alternative querying strategies. The functions `queryOne` and `queryAll` are executed in the page context. `queryOne` should take an `Element` and a selector string as argument and return a single `Element` or `null` if no element is found. `queryAll` takes the same arguments but should instead return a `NodeListOf<Element>` or `Array<Element>` with all the elements that match the given query selector.
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**Signature:**
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```typescript
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export interface CustomQueryHandler
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```
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## Properties
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| Property | Modifiers | Type | Description |
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| ------------------------------------------------------- | --------- | ---------------------------------------------------- | ----------------- |
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| [queryAll?](./puppeteer.customqueryhandler.queryall.md) | | (element: Node, selector: string) => Node\[\] | <i>(Optional)</i> |
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| [queryOne?](./puppeteer.customqueryhandler.queryone.md) | | (element: Node, selector: string) => Node \| null | <i>(Optional)</i> |
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