puppeteer-core

What is puppeteer-core?

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

playwright

Playwright is a Node library to automate the Chromium, WebKit, and Firefox browsers with a single API. It is similar to puppeteer-core but provides support for multiple browsers out of the box. It also offers additional features like network interception and emulation capabilities.

selenium-webdriver

Selenium WebDriver is one of the most well-known tools for automated web testing. It supports multiple browsers and languages, making it a versatile choice for web automation. Compared to puppeteer-core, Selenium is more mature and has a larger community but can be slower and more complex to set up.

nightmare

Nightmare is a high-level browser automation library. It is built on top of Electron, which is a framework for creating native applications with web technologies. Nightmare is designed to be simpler and more approachable than Puppeteer, but it is less powerful and only works with Electron's version of Chromium.

cypress

Cypress is a front-end testing tool built for the modern web. It is both a library for writing automated tests and a test runner that can execute them. Cypress is more focused on testing than general browser automation and provides a rich interactive interface for developing tests.

README

Puppeteer

Guides | API | FAQ | Contributing | Troubleshooting

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 (non-headless) Chrome/Chromium.

What can I do?

Most things that you can do manually in the browser can be done using Puppeteer! Here are a few examples to get you started:

• Generate screenshots and PDFs of pages.
• Crawl a SPA (Single-Page Application) and generate pre-rendered content (i.e. "SSR" (Server-Side Rendering)).
• Automate form submission, UI testing, keyboard input, etc.
• Create an automated testing environment using the latest JavaScript and browser features.
• Capture a timeline trace of your site to help diagnose performance issues.
• Test Chrome Extensions.

Getting Started

Installation

To use Puppeteer in your project, run:

npm i puppeteer
# or using yarn
yarn add puppeteer
# or using pnpm
pnpm i puppeteer

When you install Puppeteer, it automatically downloads a recent version of Chromium (~170MB macOS, ~282MB Linux, ~280MB Windows) that is guaranteed to work with Puppeteer. The browser is downloaded to the $HOME/.cache/puppeteer folder by default (starting with Puppeteer v19.0.0).

If you deploy a project using Puppeteer to a hosting provider, such as Render or Heroku, you might need to reconfigure the location of the cache to be within your project folder (see an example below) because not all hosting providers include $HOME/.cache into the project's deployment.

For a version of Puppeteer without the browser installation, see puppeteer-core.

Configuration

Puppeteer uses several defaults that can be customized through configuration files.

For example, to change the default cache directory Puppeteer uses to install browsers, you can add a .puppeteerrc.cjs (or puppeteer.config.cjs) at the root of your application with the contents

const {join} = require('path');

/**
 * @type {import("puppeteer").Configuration}
 */
module.exports = {
  // Changes the cache location for Puppeteer.
  cacheDirectory: join(__dirname, '.cache', 'puppeteer'),
};

After adding the configuration file, you will need to remove and reinstall puppeteer for it to take effect.

See the configuration guide for more information.

puppeteer-core

Every release since v1.7.0 we publish two packages:

• puppeteer
• puppeteer-core

puppeteer is a product for browser automation. When installed, it downloads a version of Chromium, which it then drives using puppeteer-core. Being an end-user product, puppeteer automates several workflows using reasonable defaults that can be customized.

puppeteer-core is a library to help drive anything that supports DevTools protocol. Being a library, puppeteer-core is fully driven through its programmatic interface implying no defaults are assumed and puppeteer-core will not download Chromium when installed.

You should use puppeteer-core if you are connecting to a remote browser or managing browsers yourself. If you are managing browsers yourself, you will need to call puppeteer.launch with an an explicit executablePath (or channel if it's installed in a standard location).

When using puppeteer-core, remember to change the import:

import puppeteer from 'puppeteer-core';

Usage

Puppeteer follows the latest maintenance LTS version of Node.

Puppeteer will be familiar to people using other browser testing frameworks. You launch/connect a browser, create some pages, and then manipulate them with Puppeteer's API.

For more in-depth usage, check our guides and examples.

Example

The following example searches developer.chrome.com for blog posts with text "automate beyond recorder", click on the first result and print the full title of the blog post.

import puppeteer from 'puppeteer';

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();

  await page.goto('https://developer.chrome.com/');

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

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

  // Wait and click on first result
  const searchResultSelector = '.search-box__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();
})();

Default runtime settings

1. Uses Headless mode

By default Puppeteer launches Chromium in old Headless mode.

const browser = await puppeteer.launch();
// Equivalent to
const browser = await puppeteer.launch({headless: true});

Chrome 112 launched a new Headless mode that might cause some differences in behavior compared to the old Headless implementation. In the future Puppeteer will start defaulting to new implementation. We recommend you try it out before the switch:

const browser = await puppeteer.launch({headless: 'new'});

To launch a "headful" version of Chromium, set the headless to false option when launching a browser:

const browser = await puppeteer.launch({headless: false});

2. Runs a bundled version of Chromium

By default, Puppeteer downloads and uses a specific version of Chromium so its API is guaranteed to work out of the box. To use Puppeteer with a different version of Chrome or Chromium, pass in the executable's path when creating a Browser instance:

const browser = await puppeteer.launch({executablePath: '/path/to/Chrome'});

You can also use Puppeteer with Firefox. See status of cross-browser support for more information.

See this article for a description of the differences between Chromium and Chrome. This article describes some differences for Linux users.

3. Creates a fresh user profile

Puppeteer creates its own browser user profile which it cleans up on every run.

Using Docker

See our Docker guide.

Using Chrome Extensions

See our Chrome extensions guide.

Resources

• API Documentation
• Guides
• Examples
• Community list of Puppeteer resources

Contributing

Check out our contributing guide to get an overview of Puppeteer development.

FAQ

Our FAQ has migrated to our site.