---
sidebar_label: PredefinedNetworkConditions
---

# PredefinedNetworkConditions variable

A list of pre-defined network conditions to be used with [Page.emulateNetworkConditions()](./puppeteer.page.emulatenetworkconditions.md).

### Signature

```typescript
PredefinedNetworkConditions: Readonly<{
  'Slow 3G': NetworkConditions;
  'Fast 3G': NetworkConditions;
  'Slow 4G': NetworkConditions;
  'Fast 4G': NetworkConditions;
}>;
```

## Example

```ts
import {PredefinedNetworkConditions} from 'puppeteer';
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.emulateNetworkConditions(PredefinedNetworkConditions['Slow 3G']);
await page.goto('https://www.google.com');
await page.emulateNetworkConditions(PredefinedNetworkConditions['Fast 3G']);
await page.goto('https://www.google.com');
// alias to Fast 3G.
await page.emulateNetworkConditions(PredefinedNetworkConditions['Slow 4G']);
await page.goto('https://www.google.com');
await page.emulateNetworkConditions(PredefinedNetworkConditions['Fast 4G']);
await page.goto('https://www.google.com');
// other actions...
await browser.close();
```
