puppeteer/website/versioned_docs/version-9.1.1/puppeteer.page.emulatenetworkconditions.md

Home > puppeteer > Page > emulateNetworkConditions

Page.emulateNetworkConditions() method

Signature:

emulateNetworkConditions(networkConditions: NetworkConditions | null): Promise<void>;

Parameters

Parameter	Type	Description
networkConditions	NetworkConditions | null	Passing null disables network condition emulation.

Returns:

Promise<void>

Remarks

NOTE: This does not affect WebSockets and WebRTC PeerConnections (see https://crbug.com/563644). To set the page offline, you can use [page.setOfflineMode(enabled)](#pagesetofflinemodeenabled).

Example

const puppeteer = require('puppeteer');
const slow3G = puppeteer.networkConditions['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();
})();