puppeteer/website/versioned_docs/version-22.4.1/api/puppeteer.webworker.md

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WebWorker

WebWorker class

This class represents a WebWorker.

Signature:

export declare abstract class WebWorker extends EventEmitter<Record<EventType, unknown>>

Extends: EventEmitter<Record<EventType, unknown>>

Remarks

The events workercreated and workerdestroyed are emitted on the page object to signal the worker lifecycle.

The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the WebWorker class.

Example

page.on('workercreated', worker =>
  console.log('Worker created: ' + worker.url())
);
page.on('workerdestroyed', worker =>
  console.log('Worker destroyed: ' + worker.url())
);

console.log('Current workers:');
for (const worker of page.workers()) {
  console.log('  ' + worker.url());
}

Properties

Property	Modifiers	Type	Description
client	readonly	CDPSession	The CDP session client the WebWorker belongs to.

Methods

Method	Modifiers	Description
close()
evaluate(func, args)		Evaluates a given function in the worker.
evaluateHandle(func, args)		Evaluates a given function in the worker.
url()		The URL of this web worker.