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45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
<!-- Do not edit this file. It is automatically generated by API Documenter. -->
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[Home](./index.md) > [puppeteer](./puppeteer.md) > [CDPSession](./puppeteer.cdpsession.md)
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## CDPSession class
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The `CDPSession` instances are used to talk raw Chrome Devtools Protocol.
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<b>Signature:</b>
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```typescript
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export declare class CDPSession extends EventEmitter
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```
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<b>Extends:</b> [EventEmitter](./puppeteer.eventemitter.md)
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## Remarks
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Protocol methods can be called with [CDPSession.send()](./puppeteer.cdpsession.send.md) method and protocol events can be subscribed to with `CDPSession.on` method.
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Useful links: [DevTools Protocol Viewer](https://chromedevtools.github.io/devtools-protocol/) and [Getting Started with DevTools Protocol](https://github.com/aslushnikov/getting-started-with-cdp/blob/master/README.md).
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The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `CDPSession` class.
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## Example
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```js
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const client = await page.target().createCDPSession();
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await client.send('Animation.enable');
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client.on('Animation.animationCreated', () => console.log('Animation created!'));
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const response = await client.send('Animation.getPlaybackRate');
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console.log('playback rate is ' + response.playbackRate);
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await client.send('Animation.setPlaybackRate', {
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playbackRate: response.playbackRate / 2
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});
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```
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## Methods
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| Method | Modifiers | Description |
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| --- | --- | --- |
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| [detach()](./puppeteer.cdpsession.detach.md) | | Detaches the cdpSession from the target. Once detached, the cdpSession object won't emit any events and can't be used to send messages. |
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| [send(method, paramArgs)](./puppeteer.cdpsession.send.md) | | |
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