mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
53 lines
2.3 KiB
Markdown
53 lines
2.3 KiB
Markdown
---
|
|
sidebar_label: WebWorker
|
|
---
|
|
|
|
# WebWorker class
|
|
|
|
This class represents a [WebWorker](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API).
|
|
|
|
#### Signature:
|
|
|
|
```typescript
|
|
export declare abstract class WebWorker extends EventEmitter<Record<EventType, unknown>>
|
|
```
|
|
|
|
**Extends:** [EventEmitter](./puppeteer.eventemitter.md)<Record<[EventType](./puppeteer.eventtype.md), 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
|
|
|
|
```ts
|
|
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 | <code>readonly</code> | [CDPSession](./puppeteer.cdpsession.md) | The CDP session client the WebWorker belongs to. |
|
|
|
|
## Methods
|
|
|
|
| Method | Modifiers | Description |
|
|
| --------------------------------------------------------------------- | --------- | --------------------------------------------------------------------- |
|
|
| [close()](./puppeteer.webworker.close.md) | | |
|
|
| [evaluate(func, args)](./puppeteer.webworker.evaluate.md) | | Evaluates a given function in the [worker](./puppeteer.webworker.md). |
|
|
| [evaluateHandle(func, args)](./puppeteer.webworker.evaluatehandle.md) | | Evaluates a given function in the [worker](./puppeteer.webworker.md). |
|
|
| [url()](./puppeteer.webworker.url.md) | | The URL of this web worker. |
|