The puppeteer-core package is a version of Puppeteer, a Node library which provides a high-level API to control headless Chrome or Chromium over the DevTools Protocol. It is intended to be a lightweight version that can be used when you want to bring your own browser. It does not download any browsers by default, unlike the full puppeteer package.

What are puppeteer-core's main functionalities?

Page Automation

Automate and control a web page, including navigation, screenshot taking, and DOM manipulation.

const puppeteer = require('puppeteer-core');

(async () => {
  const browser = await puppeteer.launch({executablePath: '/path/to/your/Chrome'});
  const page = await browser.newPage();
  await page.goto('https://example.com');
  await page.screenshot({path: 'example.png'});
  await browser.close();
})();

Form Submission

Automate form submissions by typing into fields and clicking buttons.

const puppeteer = require('puppeteer-core');

(async () => {
  const browser = await puppeteer.launch({executablePath: '/path/to/your/Chrome'});
  const page = await browser.newPage();
  await page.goto('https://example.com/login');
  await page.type('#username', 'myUsername');
  await page.type('#password', 'myPassword');
  await page.click('#submit');
  await page.waitForNavigation();
  await browser.close();
})();

Web Scraping

Extract data from web pages by running JavaScript in the context of the page.

const puppeteer = require('puppeteer-core');

(async () => {
  const browser = await puppeteer.launch({executablePath: '/path/to/your/Chrome'});
  const page = await browser.newPage();
  await page.goto('https://example.com');
  const data = await page.evaluate(() => {
    return document.querySelector('h1').textContent;
  });
  console.log(data);
  await browser.close();
})();

PDF Generation

Generate PDFs of web pages for offline viewing or archiving.

const puppeteer = require('puppeteer-core');

(async () => {
  const browser = await puppeteer.launch({executablePath: '/path/to/your/Chrome'});
  const page = await browser.newPage();
  await page.goto('https://example.com', {waitUntil: 'networkidle0'});
  await page.pdf({path: 'example.pdf', format: 'A4'});
  await browser.close();
})();

Automated Testing

Perform automated testing on web applications, including end-to-end tests, performance testing, and more.

const puppeteer = require('puppeteer-core');

(async () => {
  const browser = await puppeteer.launch({executablePath: '/path/to/your/Chrome', headless: false});
  const page = await browser.newPage();
  await page.goto('https://example.com');
  // Perform various tests, like checking if a button exists
  const buttonExists = await page.$('button') !== null;
  console.assert(buttonExists, 'Button should exist on the page');
  await browser.close();
})();

Other packages similar to puppeteer-core

Readme

Source

Puppeteer

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol. Puppeteer runs in headless mode by default, but can be configured to run in full ("headful") Chrome/Chromium.

Get started | API | FAQ | Contributing | Troubleshooting

Example

import puppeteer from 'puppeteer';

(async () => {
  // Launch the browser and open a new blank page
  const browser = await puppeteer.launch();
  const page = await browser.newPage();

  // Navigate the page to a URL
  await page.goto('https://developer.chrome.com/');

  // Set screen size
  await page.setViewport({width: 1080, height: 1024});

  // Type into search box
  await page.type('.devsite-search-field', 'automate beyond recorder');

  // Wait and click on first result
  const searchResultSelector = '.devsite-result-item-link';
  await page.waitForSelector(searchResultSelector);
  await page.click(searchResultSelector);

  // Locate the full title with a unique string
  const textSelector = await page.waitForSelector(
    'text/Customize and automate'
  );
  const fullTitle = await textSelector?.evaluate(el => el.textContent);

  // Print the full title
  console.log('The title of this blog post is "%s".', fullTitle);

  await browser.close();
})();

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Last updated on 15 Apr 2024

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