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82 lines
12 KiB
Markdown
82 lines
12 KiB
Markdown
---
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sidebar_label: Browser
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---
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# Browser class
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[Browser](./puppeteer.browser.md) represents a browser instance that is either:
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- connected to via [Puppeteer.connect()](./puppeteer.puppeteer.connect.md) or - launched by [PuppeteerNode.launch()](./puppeteer.puppeteernode.launch.md).
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[Browser](./puppeteer.browser.md) [emits](./puppeteer.eventemitter.md) various events which are documented in the [BrowserEvent](./puppeteer.browserevent.md) enum.
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#### Signature:
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```typescript
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export declare abstract class Browser extends EventEmitter<BrowserEvents>
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```
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**Extends:** [EventEmitter](./puppeteer.eventemitter.md)<[BrowserEvents](./puppeteer.browserevents.md)>
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## Remarks
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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 `Browser` class.
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## Example 1
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Using a [Browser](./puppeteer.browser.md) to create a [Page](./puppeteer.page.md):
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```ts
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import puppeteer from 'puppeteer';
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const browser = await puppeteer.launch();
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const page = await browser.newPage();
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await page.goto('https://example.com');
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await browser.close();
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```
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## Example 2
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Disconnecting from and reconnecting to a [Browser](./puppeteer.browser.md):
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```ts
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import puppeteer from 'puppeteer';
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const browser = await puppeteer.launch();
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// Store the endpoint to be able to reconnect to the browser.
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const browserWSEndpoint = browser.wsEndpoint();
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// Disconnect puppeteer from the browser.
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await browser.disconnect();
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// Use the endpoint to reestablish a connection
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const browser2 = await puppeteer.connect({browserWSEndpoint});
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// Close the browser.
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await browser2.close();
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```
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## Properties
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| Property | Modifiers | Type | Description |
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| --------- | --------------------- | ------- | ------------------------------------------------------------------------- |
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| connected | <code>readonly</code> | boolean | Whether Puppeteer is connected to this [browser](./puppeteer.browser.md). |
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## Methods
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| Method | Modifiers | Description |
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| ---------------------------------------------------------------------------------------------- | --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| [browserContexts()](./puppeteer.browser.browsercontexts.md) | | <p>Gets a list of open [browser contexts](./puppeteer.browsercontext.md).</p><p>In a newly-created [browser](./puppeteer.browser.md), this will return a single instance of [BrowserContext](./puppeteer.browsercontext.md).</p> |
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| [close()](./puppeteer.browser.close.md) | | Closes this [browser](./puppeteer.browser.md) and all associated [pages](./puppeteer.page.md). |
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| [createIncognitoBrowserContext(options)](./puppeteer.browser.createincognitobrowsercontext.md) | | <p>Creates a new incognito [browser context](./puppeteer.browsercontext.md).</p><p>This won't share cookies/cache with other [browser contexts](./puppeteer.browsercontext.md).</p> |
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| [defaultBrowserContext()](./puppeteer.browser.defaultbrowsercontext.md) | | Gets the default [browser context](./puppeteer.browsercontext.md). |
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| [disconnect()](./puppeteer.browser.disconnect.md) | | Disconnects Puppeteer from this [browser](./puppeteer.browser.md), but leaves the process running. |
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| [isConnected()](./puppeteer.browser.isconnected.md) | | Whether Puppeteer is connected to this [browser](./puppeteer.browser.md). |
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| [newPage()](./puppeteer.browser.newpage.md) | | Creates a new [page](./puppeteer.page.md) in the [default browser context](./puppeteer.browser.defaultbrowsercontext.md). |
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| [pages()](./puppeteer.browser.pages.md) | | <p>Gets a list of all open [pages](./puppeteer.page.md) inside this [Browser](./puppeteer.browser.md).</p><p>If there ar multiple [browser contexts](./puppeteer.browsercontext.md), this returns all [pages](./puppeteer.page.md) in all [browser contexts](./puppeteer.browsercontext.md).</p> |
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| [process()](./puppeteer.browser.process.md) | | Gets the associated [ChildProcess](https://nodejs.org/api/child_process.html#class-childprocess). |
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| [target()](./puppeteer.browser.target.md) | | Gets the [target](./puppeteer.target.md) associated with the [default browser context](./puppeteer.browser.defaultbrowsercontext.md)). |
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| [targets()](./puppeteer.browser.targets.md) | | <p>Gets all active [targets](./puppeteer.target.md).</p><p>In case of multiple [browser contexts](./puppeteer.browsercontext.md), this returns all [targets](./puppeteer.target.md) in all [browser contexts](./puppeteer.browsercontext.md).</p> |
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| [userAgent()](./puppeteer.browser.useragent.md) | | <p>Gets this [browser's](./puppeteer.browser.md) original user agent.</p><p>[Pages](./puppeteer.page.md) can override the user agent with [Page.setUserAgent()](./puppeteer.page.setuseragent.md).</p> |
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| [version()](./puppeteer.browser.version.md) | | <p>Gets a string representing this [browser's](./puppeteer.browser.md) name and version.</p><p>For headless browser, this is similar to <code>"HeadlessChrome/61.0.3153.0"</code>. For non-headless or new-headless, this is similar to <code>"Chrome/61.0.3153.0"</code>. For Firefox, it is similar to <code>"Firefox/116.0a1"</code>.</p><p>The format of [Browser.version()](./puppeteer.browser.version.md) might change with future releases of browsers.</p> |
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| [waitForTarget(predicate, options)](./puppeteer.browser.waitfortarget.md) | | <p>Waits until a [target](./puppeteer.target.md) matching the given <code>predicate</code> appears and returns it.</p><p>This will look all open [browser contexts](./puppeteer.browsercontext.md).</p> |
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| [wsEndpoint()](./puppeteer.browser.wsendpoint.md) | | <p>Gets the WebSocket URL to connect to this [browser](./puppeteer.browser.md).</p><p>This is usually used with [Puppeteer.connect()](./puppeteer.puppeteer.connect.md).</p><p>You can find the debugger URL (<code>webSocketDebuggerUrl</code>) from <code>http://HOST:PORT/json/version</code>.</p><p>See [browser endpoint](https://chromedevtools.github.io/devtools-protocol/#how-do-i-access-the-browser-target) for more information.</p> |
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