puppeteer/docs/api/puppeteer.puppeteer.md

---
sidebar_label: Puppeteer
---
# Puppeteer class

The main Puppeteer class.

IMPORTANT: if you are using Puppeteer in a Node environment, you will get an instance of [PuppeteerNode](./puppeteer.puppeteernode.md) when you import or require `puppeteer`. That class extends `Puppeteer`, so has all the methods documented below as well as all that are defined on [PuppeteerNode](./puppeteer.puppeteernode.md).

**Signature:**

```typescript
export declare class Puppeteer 
```

## Remarks

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

## Properties

|  Property | Modifiers | Type | Description |
|  --- | --- | --- | --- |
|  [\_changedProduct](./puppeteer.puppeteer._changedproduct.md) |  | boolean |  |
|  [\_isPuppeteerCore](./puppeteer.puppeteer._ispuppeteercore.md) |  | boolean |  |
|  [devices](./puppeteer.puppeteer.devices.md) |  | typeof devices |  |
|  [errors](./puppeteer.puppeteer.errors.md) |  | typeof [errors](./puppeteer.errors.md) |  |
|  [networkConditions](./puppeteer.puppeteer.networkconditions.md) |  | typeof [networkConditions](./puppeteer.networkconditions.md) |  |

## Methods

|  Method | Modifiers | Description |
|  --- | --- | --- |
|  [clearCustomQueryHandlers()](./puppeteer.puppeteer.clearcustomqueryhandlers.md) |  |  |
|  [connect(options)](./puppeteer.puppeteer.connect.md) |  | This method attaches Puppeteer to an existing browser instance. |
|  [customQueryHandlerNames()](./puppeteer.puppeteer.customqueryhandlernames.md) |  |  |
|  [registerCustomQueryHandler(name, queryHandler)](./puppeteer.puppeteer.registercustomqueryhandler.md) |  |  |
|  [unregisterCustomQueryHandler(name)](./puppeteer.puppeteer.unregistercustomqueryhandler.md) |  |  |