puppeteer/website/versioned_docs/version-10.0.0/puppeteer.puppeteer.registercustomqueryhandler.md
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Co-authored-by: Jack Franklin <jacktfranklin@chromium.org>
2021-08-09 09:57:14 +01:00

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Puppeteer](./puppeteer.puppeteer.md) &gt; [registerCustomQueryHandler](./puppeteer.puppeteer.registercustomqueryhandler.md)
## Puppeteer.registerCustomQueryHandler() method
Registers a [custom query handler](./puppeteer.customqueryhandler.md). After registration, the handler can be used everywhere where a selector is expected by prepending the selection string with `<name>/`. The name is only allowed to consist of lower- and upper case latin letters.
<b>Signature:</b>
```typescript
registerCustomQueryHandler(name: string, queryHandler: CustomQueryHandler): void;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| name | string | The name that the custom query handler will be registered under. |
| queryHandler | [CustomQueryHandler](./puppeteer.customqueryhandler.md) | The [custom query handler](./puppeteer.customqueryhandler.md) to register. |
<b>Returns:</b>
void
## Example
```
puppeteer.registerCustomQueryHandler('text', { … });
const aHandle = await page.$('text/…');
```