How to use emulateCPUThrottling method in Puppeteer

Best JavaScript code snippet using puppeteer

index.js

Source: index.js Github

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...32 var res = [];33 for (i = 0; i < iterazioni; i++) {34 const page = await browser.newPage();35 await page.emulateNetworkConditions(avgFixed)36 await page.emulateCPUThrottling(argv.cpu || 1);37 page.setCacheEnabled(false);38 if (argv.nexus == true) {39 await page.emulate(nexus);40 } else {41 await page.setViewport({42 width: argv.w || 1920,43 height: argv.h || 1080,44 deviceScaleFactor: 1,45 isMobile: argv.mobile || false,46 });47 }48 page.on('console', function(msg) { try { log.push(JSON.parse(msg.text())); } catch {49 (argv.v == true) && console.log(msg.text()) } });50 await page.goto(argv.url);...

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lcp.js

Source: lcp.js Github

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...47 const client = await page.target().createCDPSession();48 await client.send("Network.enable");49 await client.send("ServiceWorker.enable");50 /​/​ await page.emulateNetworkConditions(networkConditions["Fast 3G"]);51 /​/​ await page.emulateCPUThrottling(4);52 await page.emulate(phone);53 await page.evaluateOnNewDocument(calculateLCP);54 await page.goto(url, { waitUntil: "load", timeout: 60000 });55 const lcp = await page.evaluate(() => {56 return window.largestContentfulPaint;57 });58 browser.close();59 return lcp;60 } catch (error) {61 console.log(error);62 browser.close();63 }64}65getLCP("https:/​/​mw-production1.coach.com").then((lcp) =>...

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benchmark.js

Source: benchmark.js Github

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...4const test = async (name) => {5 const browser = await puppeteer.launch({ headless, timeout: 0 })6 const page = await browser.newPage()7 const navigationPromise = page.waitForNavigation()8 await page.emulateCPUThrottling(6)9 const root = `benchmark/​${name}`10 if (!fs.existsSync(root)) {11 fs.mkdirSync(root, { recursive: true })12 }13 await page.tracing.start({ path: `${root}/​tracing.json` })14 page.setDefaultNavigationTimeout(0)15 await page.goto(`http:/​/​localhost:3000/​${name}`, {16 waitUntil: "load",17 timeout: 0,18 })19 await navigationPromise20 const count = 421 for (let i = 0; i < count; i++) {22 await page.type(`[name=input-${i}]`, "Hello")...

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mac.wsce.config.js

Source: mac.wsce.config.js Github

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...20 name: "CPU Throttling",21 when: "before",22 twice: false,23 run: async (_, page, __) => {24 await page.emulateCPUThrottling(1);25 },26 },27 ],28 puppeteerOptions: { headless: true },29 },30 exporter: {31 port: 3001,32 },...

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puppet.js

Source: puppet.js Github

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...15 url: process.env.object_FULL_URL,16 name: "objecttoken",17 value: process.env.object_AUTH18 })19 await page.emulateCPUThrottling(parseInt(process.env.object_THROTTLE));20 console.log("page setup complete")21 await page.goto(process.env.object_FULL_URL);22 page.on('console', (msg) => console.log(msg.text()));...

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throttle-network-cpu.js

Source: throttle-network-cpu.js Github

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...5 const client = await page.target().createCDPSession();6 await client.send('Network.enable');7 /​/​ Simulated network throttling (Slow 3G)8 await page.emulateNetworkConditions(puppeteer.networkConditions['Slow 3G']);9 await page.emulateCPUThrottling(4);10 await browser.close();...

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estimo.js

Source: estimo.js Github

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1const estimo = require('estimo')2async function doThis() {3 const report = await estimo(['http:/​/​localhost:3000/​error-boundary', 'http:/​/​localhost:3000/​optional-chaining'], {4 runs: 5, emulateCpuThrottling: true,5 cpuThrottlingRate: 4,6 })7 console.log({ report });8}...

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cpu-throttling.js

Source: cpu-throttling.js Github

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...4 name: "CPU Throttling",5 when: "before",6 twice: false,7 run: async (_, page, __) => {8 await page.emulateCPUThrottling(factor);9 },10};...

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Using AI Code Generation

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1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch();4 const page = await browser.newPage();5 await page.emulateCPUThrottling(4);6 await page.screenshot({path: 'example.png'});7 await browser.close();8})();

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Using AI Code Generation

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1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch({4 });5 const page = await browser.newPage();6 await page.emulateCPUThrottling(4);7 await page.waitFor(5000);8 await browser.close();9})();

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Using AI Code Generation

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1const puppeteer = require('puppeteer');2const fs = require('fs');3(async () => {4 const browser = await puppeteer.launch({ headless: false });5 const page = await browser.newPage();6 await page.emulateCPUThrottling(4);7 await page.screenshot({ path: 'google.png' });8 await browser.close();9})();10const puppeteer = require('puppeteer');11const fs = require('fs');12(async () => {13 const browser = await puppeteer.launch({ headless: false });14 const page = await browser.newPage();15 await page.emulateNetworkConditions({16 });17 await page.screenshot({ path: 'google.png' });18 await browser.close();19})();20const puppeteer = require('puppeteer');21const fs = require('fs');22(async () => {23 const browser = await puppeteer.launch({ headless: false });24 const page = await browser.newPage();25 await page.emulateMedia('screen');26 await page.screenshot({ path: 'google.png' });27 await browser.close();28})();29const puppeteer = require('puppeteer');30const fs = require('fs');31(async () => {32 const browser = await puppeteer.launch({ headless: false });33 const page = await browser.newPage();34 const title = await page.evaluate(() => document.title);35 console.log(title);36 await browser.close();37})();38const puppeteer = require('puppeteer');39const fs = require('fs');40(async () => {41 const browser = await puppeteer.launch({ headless: false });42 const page = await browser.newPage();

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Using AI Code Generation

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1const puppeteer = require("puppeteer");2(async () => {3 const browser = await puppeteer.launch({4 });5 let pages = await browser.pages();6 let tab = pages[0];7 await tab.emulateCPUThrottling(4);8})();

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Using AI Code Generation

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1const puppeteer = require('puppeteer');2async function emulateCPUThrottling() {3 const browser = await puppeteer.launch({4 });5 const page = await browser.newPage();6 await page.emulate(puppeteer.devices['iPhone X']);7 await page.emulateCPUThrottling(4);8 await page.waitFor(5000);9 await browser.close();10}11emulateCPUThrottling();

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Using AI Code Generation

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1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch({headless: false, args: ['--disable-gpu', '--disable-dev-shm-usage', '--no-sandbox']});4 const page = await browser.newPage();5 const client = await page.target().createCDPSession();6 await client.send('Emulation.setCPUThrottlingRate', { rate: 4 });7 await page.screenshot({path: 'example.png'});8 await browser.close();9})();

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Using AI Code Generation

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1const puppeteer = require('puppeteer');2(async () => {3 const browser = await puppeteer.launch({headless: false});4 const page = await browser.newPage();5 await page.emulateCPUThrottling(4);6 await page.screenshot({path: 'google.png'});7 await browser.close();8})();9const puppeteer = require('puppeteer');10(async () => {11 const browser = await puppeteer.launch({headless: false});12 const page = await browser.newPage();13 await page.emulateNetworkConditions({14 });15 await page.screenshot({path: 'google.png'});16 await browser.close();17})();18const puppeteer = require('puppeteer');19(async () => {20 const browser = await puppeteer.launch({headless: false});21 const page = await browser.newPage();22 await page.emulateMedia('screen');23 await page.screenshot({path: 'google.png'});24 await browser.close();25})();26const puppeteer = require('puppeteer');27(async () => {28 const browser = await puppeteer.launch({headless: false});29 const page = await browser.newPage();30 await page.emulate({31 viewport: {32 },33 });34 await page.screenshot({path: 'google.png'});35 await browser.close();36})();37const puppeteer = require('puppeteer');38(async () => {39 const browser = await puppeteer.launch({headless: false});

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StackOverFlow community discussions

Questions
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It seems that the dropzone needs a little push. You could trigger a change so the dropzone knows that there is a new file in the file input.

(async () => {
  const browser = await puppeteer.launch({
    headless: false,
    ignoreDefaultArgs: true
  });
  const page = await browser.newPage();
  await page.goto('https://react-dropzone.js.org/');
  await page.waitForSelector('input[type=file]');
  const fileInput  = await page.$('#rsg-root > div > main > section > section:nth-child(3) > section > section:nth-child(1) > article > div:nth-child(2) > div.rsg--preview-60 > div > section > div > input[type=file]');
  await fileInput.uploadFile("./test/playground.js");

  ///HERE
  await fileInput.evaluate(upload => upload.dispatchEvent(new Event('change', { bubbles: true })));
  ///

  await page.close();
})();
https://stackoverflow.com/questions/60072170/is-there-a-way-to-upload-a-file-in-react-dropzone-with-puppeteer

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