puppeteer/website/versioned_docs/version-16.1.0/api/puppeteer.eventemitter.once.md
release-please[bot] 2d5f216621
chore(main): release 16.1.0 (#8743)
* chore(main): release 16.1.0

* chore: generate versioned docs

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
2022-08-06 16:49:20 +02:00

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EventEmitter.once

EventEmitter.once() method

Like on but the listener will only be fired once and then it will be removed.

Signature:

class EventEmitter {
  once(event: EventType, handler: Handler): EventEmitter;
}

Parameters

Parameter Type Description
event EventType the event you'd like to listen to
handler Handler the handler function to run when the event occurs

Returns:

EventEmitter

this to enable you to chain method calls.