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Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Nikolay Vitkov <nvitkov@chromium.org>
59 lines
562 B
Markdown
59 lines
562 B
Markdown
---
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sidebar_label: CommonEventEmitter.once
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---
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# CommonEventEmitter.once() method
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#### Signature:
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```typescript
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interface CommonEventEmitter {
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once<Key extends keyof Events>(
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type: Key,
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handler: Handler<Events[Key]>
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): this;
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}
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```
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## Parameters
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<table><thead><tr><th>
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Parameter
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</th><th>
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Type
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</th><th>
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Description
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</th></tr></thead>
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<tbody><tr><td>
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type
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</td><td>
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Key
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</td><td>
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</td></tr>
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<tr><td>
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handler
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</td><td>
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[Handler](./puppeteer.handler.md)<Events\[Key\]>
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</td><td>
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</td></tr>
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</tbody></table>
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**Returns:**
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this
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