puppeteer/docs/api/puppeteer.predefinednetworkconditions.md

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---
sidebar_label: PredefinedNetworkConditions
---
# PredefinedNetworkConditions variable
A list of network conditions to be used with [Page.emulateNetworkConditions()](./puppeteer.page.emulatenetworkconditions.md).
**Signature:**
```typescript
PredefinedNetworkConditions: Readonly<{
'Slow 3G': NetworkConditions;
'Fast 3G': NetworkConditions;
}>;
```
## Example
```ts
import {PredefinedNetworkConditions} from 'puppeteer';
const slow3G = PredefinedNetworkConditions['Slow 3G'];
(async () => {
const browser = await puppeteer.launch();
const page = await browser.newPage();
await page.emulateNetworkConditions(slow3G);
await page.goto('https://www.google.com');
// other actions...
await browser.close();
})();
```