Skip to content

Instantly share code, notes, and snippets.

@trungpv1601

trungpv1601/list.js

Last active Aug 3, 2020
Embed
What would you like to do?
Network throttling in Puppeteer. Read more: https://fdalvi.github.io/blog/2018-02-05-puppeteer-network-throttle/
let NETWORK_PRESETS = {
'GPRS': {
'offline': false,
'downloadThroughput': 50 * 1024 / 8,
'uploadThroughput': 20 * 1024 / 8,
'latency': 500
},
'Regular2G': {
'offline': false,
'downloadThroughput': 250 * 1024 / 8,
'uploadThroughput': 50 * 1024 / 8,
'latency': 300
},
'Good2G': {
'offline': false,
'downloadThroughput': 450 * 1024 / 8,
'uploadThroughput': 150 * 1024 / 8,
'latency': 150
},
'Regular3G': {
'offline': false,
'downloadThroughput': 750 * 1024 / 8,
'uploadThroughput': 250 * 1024 / 8,
'latency': 100
},
'Good3G': {
'offline': false,
'downloadThroughput': 1.5 * 1024 * 1024 / 8,
'uploadThroughput': 750 * 1024 / 8,
'latency': 40
},
'Regular4G': {
'offline': false,
'downloadThroughput': 4 * 1024 * 1024 / 8,
'uploadThroughput': 3 * 1024 * 1024 / 8,
'latency': 20
},
'DSL': {
'offline': false,
'downloadThroughput': 2 * 1024 * 1024 / 8,
'uploadThroughput': 1 * 1024 * 1024 / 8,
'latency': 5
},
'WiFi': {
'offline': false,
'downloadThroughput': 30 * 1024 * 1024 / 8,
'uploadThroughput': 15 * 1024 * 1024 / 8,
'latency': 2
}
}
const puppeteer = require('puppeteer')
puppeteer.launch().then(async browser => {
// Create a new tab
const page = await browser.newPage()
// Connect to Chrome DevTools
const client = await page.target().createCDPSession()
// Set throttling property
await client.send('Network.emulateNetworkConditions', {
'offline': false,
'downloadThroughput': 200 * 1024 / 8,
'uploadThroughput': 200 * 1024 / 8,
'latency': 20
})
// Navigate and take a screenshot
await page.goto('https://fdalvi.github.io')
await page.screenshot({path: 'screenshot.png'})
await browser.close()
})
@danielcaldas

This comment has been minimized.

Copy link

@danielcaldas danielcaldas commented Apr 29, 2020

This is rad.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.