puppeteer/docs/api/puppeteer.page.emulate.md

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---
sidebar_label: Page.emulate
---
# Page.emulate() method
Emulates a given device's metrics and user agent.
To aid emulation, Puppeteer provides a list of known devices that can be via [KnownDevices](./puppeteer.knowndevices.md).
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#### Signature:
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```typescript
class Page {
emulate(device: Device): Promise<void>;
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}
```
## Parameters
| Parameter | Type | Description |
| --------- | ------------------------------- | ----------- |
| device | [Device](./puppeteer.device.md) | |
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**Returns:**
Promise&lt;void&gt;
## Remarks
This method will resize the page. A lot of websites don't expect phones to change size, so you should emulate before navigating to the page.
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## Example
```ts
import {KnownDevices} from 'puppeteer';
const iPhone = KnownDevices['iPhone 6'];
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(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.emulate(iPhone);
await page.goto('https://www.google.com');
// other actions...
await browser.close();
})();
```