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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
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+# Puppeteer
+
+[![Build status](https://github.com/puppeteer/puppeteer/workflows/CI/badge.svg)](https://github.com/puppeteer/puppeteer/actions?query=workflow%3ACI)
+[![npm puppeteer package](https://img.shields.io/npm/v/puppeteer.svg)](https://npmjs.org/package/puppeteer)
+
+<img src="https://user-images.githubusercontent.com/10379601/29446482-04f7036a-841f-11e7-9872-91d1fc2ea683.png" height="200" align="right"/>
+
+#### [Guides](https://pptr.dev/category/guides) | [API](https://pptr.dev/api) | [FAQ](https://pptr.dev/faq) | [Contributing](https://pptr.dev/contributing) | [Troubleshooting](https://pptr.dev/troubleshooting)
+
+> Puppeteer is a Node.js library which provides a high-level API to control
+> Chrome/Chromium over the
+> [DevTools Protocol](https://chromedevtools.github.io/devtools-protocol/).
+> Puppeteer runs in
+> [headless](https://developer.chrome.com/articles/new-headless/)
+> mode by default, but can be configured to run in full ("headful")
+> 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](https://developers.google.com/web/tools/chrome-devtools/evaluate-performance/reference)
+ of your site to help diagnose performance issues.
+- [Test Chrome Extensions](https://pptr.dev/guides/chrome-extensions).
+
+## Getting Started
+
+### Installation
+
+To use Puppeteer in your project, run:
+
+```bash
+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
+[Chrome for Testing](https://goo.gle/chrome-for-testing) (~170MB macOS, ~282MB Linux, ~280MB Windows) that is [guaranteed to
+work](https://pptr.dev/faq#q-why-doesnt-puppeteer-vxxx-work-with-chromium-vyyy)
+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`](#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
+
+```js
+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](https://pptr.dev/guides/configuration) for more
+information.
+
+#### `puppeteer-core`
+
+Every release since v1.7.0 we publish two packages:
+
+- [`puppeteer`](https://www.npmjs.com/package/puppeteer)
+- [`puppeteer-core`](https://www.npmjs.com/package/puppeteer-core)
+
+`puppeteer` is a _product_ for browser automation. When installed, it downloads
+a version of Chrome, which it then drives using `puppeteer-core`. Being an
+end-user product, `puppeteer` automates several workflows using reasonable
+defaults [that can be customized](https://pptr.dev/guides/configuration).
+
+`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 Chrome when installed.
+
+You should use `puppeteer-core` if you are
+[connecting to a remote browser](https://pptr.dev/api/puppeteer.puppeteer.connect)
+or [managing browsers yourself](https://pptr.dev/api/puppeteer.browserfetcher).
+If you are managing browsers yourself, you will need to call
+[`puppeteer.launch`](https://pptr.dev/api/puppeteer.puppeteernode.launch) with
+an an explicit
+[`executablePath`](https://pptr.dev/api/puppeteer.launchoptions)
+(or [`channel`](https://pptr.dev/api/puppeteer.launchoptions) if it's
+installed in a standard location).
+
+When using `puppeteer-core`, remember to change the import:
+
+```ts
+import puppeteer from 'puppeteer-core';
+```
+
+### Usage
+
+Puppeteer follows the latest
+[maintenance LTS](https://github.com/nodejs/Release#release-schedule) version of
+Node.
+
+Puppeteer will be familiar to people using other browser testing frameworks. You
+[launch](https://pptr.dev/api/puppeteer.puppeteernode.launch)/[connect](https://pptr.dev/api/puppeteer.puppeteernode.connect)
+a [browser](https://pptr.dev/api/puppeteer.browser),
+[create](https://pptr.dev/api/puppeteer.browser.newpage) some
+[pages](https://pptr.dev/api/puppeteer.page), and then manipulate them with
+[Puppeteer's API](https://pptr.dev/api).
+
+For more in-depth usage, check our [guides](https://pptr.dev/category/guides)
+and [examples](https://github.com/puppeteer/puppeteer/tree/main/examples).
+
+#### Example
+
+The following example searches [developer.chrome.com](https://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.
+
+```ts
+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 Chrome in
+[old Headless mode](https://developer.chrome.com/articles/new-headless/).
+
+```ts
+const browser = await puppeteer.launch();
+// Equivalent to
+const browser = await puppeteer.launch({headless: true});
+```
+
+[Chrome 112 launched a new Headless mode](https://developer.chrome.com/articles/new-headless/) 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:
+
+```ts
+const browser = await puppeteer.launch({headless: 'new'});
+```
+
+To launch a "headful" version of Chrome, set the
+[`headless`](https://pptr.dev/api/puppeteer.browserlaunchargumentoptions) to `false`
+option when launching a browser:
+
+```ts
+const browser = await puppeteer.launch({headless: false});
+```
+
+**2. Runs a bundled version of Chrome**
+
+By default, Puppeteer downloads and uses a specific version of Chrome 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:
+
+```ts
+const browser = await puppeteer.launch({executablePath: '/path/to/Chrome'});
+```
+
+You can also use Puppeteer with Firefox. See
+[status of cross-browser support](https://pptr.dev/faq/#q-what-is-the-status-of-cross-browser-support) for
+more information.
+
+See
+[`this article`](https://www.howtogeek.com/202825/what%E2%80%99s-the-difference-between-chromium-and-chrome/)
+for a description of the differences between Chromium and Chrome.
+[`This article`](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/chromium_browser_vs_google_chrome.md)
+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](https://pptr.dev/guides/docker).
+
+#### Using Chrome Extensions
+
+See our [Chrome extensions guide](https://pptr.dev/guides/chrome-extensions).
+
+## Resources
+
+- [API Documentation](https://pptr.dev/api)
+- [Guides](https://pptr.dev/category/guides)
+- [Examples](https://github.com/puppeteer/puppeteer/tree/main/examples)
+- [Community list of Puppeteer resources](https://github.com/transitive-bullshit/awesome-puppeteer)
+
+## Contributing
+
+Check out our [contributing guide](https://pptr.dev/contributing) to get an
+overview of Puppeteer development.
+
+## FAQ
+
+Our [FAQ](https://pptr.dev/faq) has migrated to
+[our site](https://pptr.dev/faq).