Puppeteer multiple instances. js: to launch puppeteer only once; puppeteer_environment.
Puppeteer multiple instances Puppeteer Cluster lets you run multiple Puppeteer instances at the same time. So what I am trying to do is to open puppeteer window with my google profile, but what I want is to do it multiple times, what I mean is 2-4 windows but with the same Using your alternative approach of generating new browser instances that "connect" to the singleton browser instance and then requesting pages with those In every example that I've found I always seen the call to puppeteer and the browser and page object within the main function. Bug description. One with just one tab and it's about:blank. json file and then have my code launch Learn how to handle multiple browser instances in Puppeteer, a Node. Right now I'm using puppeteer (NodeJS library) to convert HTML into PDF documents. While the first instance is running, I execute another instance with either the same or new profile. Load 7 more related questions Show Puppeteer launch multiple instances with unique data? 0. How to get pages to open in the same browser window from different async functions using puppeteer? Of course, it would be great to prevent my IP from getting banned too, so if there was a way to apply proxies to each respective "browser"/ instance, that would be perfect. launch({ monitor: false, concurrency: Cluster. The exception stack refers to message_window. For example, see the code below, uses 1 browser and multiple pages to do Scaling Puppeteer Scrapers: To scale Puppeteer scrapers, you can use browser contexts and the Puppeteer-cluster library. Hot Network Questions Humans try to help aliens deactivate their defensive barrier Bash script that waits until GPU is free 20-40 puppeteer instances randomly fail with message "Failed to launch Chrome!". Stack Overflow. This guide offers examples for launching several instances for tasks like opening different URLs or user sessions. The other one starts with about:blank and redirects to Puppeteer Cluster will automatically distribute these URLs to the available browser instances. One of the main advantages is its ease of use and flexibility. Hot Network Questions Puppeteer launch multiple instances with unique data? 2. launch(); const page = await browser. This would make sure chrome can take its sweet time and also I've been playing around with the idea of a Puppeteer pool, using the generic-pool from NPM to handle multiple instances of Puppeteer. createWAClient - Used for creating new instance of the Whatsapp web session. Skip to content. This will install Puppeteer along with a Chromium instance, which is sufficient for basic scraping tasks. You will have to initiate Reuse the browser and page instances instead of launching a browser each time; Also expose your chrome scraper to take requests from a queue rather than a rest endpoint. It is important to fortify your Puppeteer scraper when using it for web scraping because it reveals many fingerprints that can be used to identify it. But it's possible to archieve what I'm looking for and still be able to use at least the page object within Page Object files ? Puppeteer launch multiple instances with unique data? 0. 9. launch({executablePath: '/path/to/Chrome'}); Is it safe/supported to run multiple instances of Puppeteer at the same time, either at the process level (multiple node screenshot. Ideal for scraping multiple URLs concurrently, but use a task queue for large numbers to avoid system overload. So what I am trying to do is to open puppeteer window with my google profile, but what I want is to do it multiple times, what I mean is 2-4 windows but with the same profile - is A BrowserContext is an isolated incognito session within a Browser instance. I need to load multiples pages and inject a javascript. Comes with plugins like puppeteer-extra-plugin-stealth to change headers, user agents, and hide a browser’s headless status. Is it safe to run multiple instances of Puppeteer at the same time? 4 How to properly use sandbox with puppeteer on linux and stop getting insecure? Related questions. In the implementation, if I'd like to use multiple chromium profiles simultaneously using puppeteer. This allows you to collect data from multiple streams simultaneously. With the default settings and a three-node cluster, for instance, it will take less than 2 minutes to scrape 400 pages on books. json file. Puppeteer & cycling a process through multiple users. close shuts down the cluster and closes all browser instances. Two Lambda functions are used in this example. js APIs. Follow answered Sep 12, 2021 at 19:52. I'm unable to spawn more than 2 instances of puppeteer. But I want to have only 1 instance of browser and all tests can be new tabs which I think would be more performant as well. getClientFromSessionId - Used for retrieving instance based on it's unique key. waitForSelector('. 10. Im not using a node server but i jave tried too and it also crashes. This is helpful if you want to crawl multiple pages or run tests in parallel. class_1, . How many instances are you trying to run and why? Using multithreading or multiprocessing doesn't guarantee free lunch (perfect parallelization) on all workloads. I've got At the moment I have 100+ browsers open using Puppeteer, Not even within a real browser, due to a Chrome Profile is tied to a browser instance not a browser tab. What is the recommended approach to do this? I asked on the repo but author redirected me here. See documentation here. Hot Network Questions Does the Supremacy Clause allow states to retain abortion rights enshrined in each states' constitution? At the moment I have 100+ browsers open using Puppeteer, each having a different Chrome Profile. In the implementation, if I Hello, I'm trying to execute multiple instances (between 40~60) at the same time but I've had some issues with this approach (high increase in execution time, random errors, etc). so I want to screenshot a specific class multiple times, but all the time it would say Session Closed or Terminated, therefore I worked around implementing multiple screenshots opening multiple instances. Fast iteration – I originally wanted to launch a Puppeteer instance for each unique profile I had. theDavidBarton Puppeteer 1. goto function has multiple parameters you can use to ensure that the page is fully loaded. I'm also aware of puppeteer-cluster however I realize that with puppeteer-cluster i'm unable to set the userDataDir, so i'll have to use normal puppeteer :(Anyone able to help? I've read (Running headless Chrome / Puppeteer with --no-sandbox) that --no-sandbox has security risks, but why? I am on Ubuntu 16. How can I optimize my code so, it can run effectively? 0. Puppeteer multiple browsers or pages. js at the same time) or at the script level (multiple puppeteer. but if your Puppeteer instance is short-lived then this might not matter. on('request-mainprocess-action', (Skip to main content. That includes: Storing and reusing cookies; Reconnecting to browsers; and to add on that, if you have Building upon my previous guide, which uses `puppeteer-with-fingerprints`, this guide will leverage a custom plugin provided by `puppeteer-with-fingerprints`. How to get pages to open in the same browser window from different async functions using puppeteer? I originally wanted to launch a Puppeteer instance for each unique profile I had. A typical scraping job gets a bunch of URLs and it needs to open a page, interact with the site, possibly by logging in and navigating around, and extract a piece of data. Which is expected, because, IMO, single browser with multiple should take up less resources when compared to spinning up multiple whole browser instances. Concurrent page scraping with Puppeteer. launch() method. Advanced setup of Puppeteer cluster. 1 Puppeteer with Node 10. The use-case is such that multiple users can hit an end-point for information which involves launching puppeteer and browsing through various URLs. Navigation Menu Toggle navigation. I've got everything working, but I'm somewhat concerned with running multiple browsers concurrently. That class extends Puppeteer, so has all the methods documented below as well as all that are defined on PuppeteerNode. and am using proxies each instance has it's own proxy the code : In this article we'll look at managing sessions and their data when using Puppeteer. Browser contexts let you create multiple, separate browser I can launch multiple chrome instances from a single user data directory and I can do the same for chromium too. 0. A BrowserContext is an isolated incognito session within a Browser instance. This guide aims to provide a clear and practical solution to handle multiple tabs effectively. Puppeteer is the perfect choice for this, as it uses an actual browser that solves a whole array of edge cases. puppeteer's page. The first instance accepts video files, while the other two accept image types. Puppeteer Sharp: Multiple Browsers Concurrently. By default, Puppeteer downloads and uses a specific version of Chrome. Puppeteer find array elements in page and then click. js: to launch puppeteer only once; puppeteer_environment. This code sets up a basic Puppeteer script. . Can I have multiple Puppeteer browsers open? 9. puppeteer : cant log in and loop through urls. connect()). If number of puppeteer test instances is reduced to 50, then all of them succeed. In addition, you can use the Puppeteer 1. The second browser pops up Puppeteer-cluster creates a pool of Chromium instances that can handle a large number of requests efficiently. Find and fix vulnerabilities Actions. Puppeteer - Using only 1 browser instance. Basic Launch import puppeteer from 'puppeteer'; const browser = await puppeteer. Sign in Product GitHub Copilot. @VikramTiwari are you sure you launch multiple chrome I would like to know if it is possible to have one . It launches a new headless browser instance and creates multiple page instances using thenewPage() method. A Puppeteer function that requires a URL and bucket name as inputs. Running multiple instances of Puppeteer on a single Reuse the browser and page instances instead of launching a browser each time; Also expose your chrome scraper to take requests from a queue rather than a rest endpoint. createBrowserContext) so to avoid launching multiple instances if one wants a pristine session. execute(url) } I want all 5 jest. 0; Tested with multiple OSes and other setup. 6. Is it possible to connect a browser to puppeteer without instantiating it in puppeteer? For example, running an instance of chromium like a regular user and then connecting that to an instance of . I've been trying to get puppeteer to launch a unique instance for every profile stored in a . execute(url) } I want all 5 When i only have 2 puppeteer instances opening chrome it wont crash but anymore seem to crash heroku. Remarks: The constructor for this class is marked as internal. js In every example that I've found I always seen the call to puppeteer and the browser and page object within the main function. This is because currently I am stuck creating a new folder with all my code and a unique . toscrape. execute(url) } I want all 5 I have a problem when using the puppeteer that are: I built a console app to craw data using puppeteer, but when my app is shutdown, I still see many chromium appear in Processes Task Manager. I guess that's a problem with context access. Hey, It would be great help if you share the code of how you WebSocket Connections: Establish connections to existing browser instances using WebSockets. 1 I've been running some tests using multiple Puppeteer instances in a generic-pool and trying to operate at and beyond I recently made my first automated app using Node and Puppeteer. Scraping the same page forever using puppeteer. How can I achieve this? Would I need to store the browserWSEndpoint of the Chromium instance to a file and then retrieve it every time a new user submits a request? (This would be using browserWSEndpoint with puppeteer. Ask Question Asked 4 years, 6 months ago. Benefits of Using Puppeteer for Automation. I provie the proxy from a Array called socks. js library. Running multiple instances of puppeteer at once with different session for each #4481 To launch multiple browsers using Puppeteer, you can create multiple instances of the puppeteer. In this setup, each Chromium instance in the Puppeteer Cluster can be Try opening 60 instances of chrome in your machine, and you will find that your computer will start burning up. The problem is that only one browser does the test and the other one doesn't. js: this is the default conf file for Jest, you will wire the other setup files here so Jest will use the custom puppeteer; setup. 2 Puppeteer launch multiple instances with unique data? 0. Use case-driven examples for using Puppeteer and headless chrome - puppeteer/examples. I tried using waitForNavigation({waitUntil: "networkidle2"}); Puppeteer waitForSelector on multiple selectors. Write better code with AI Security. js: custom environment Class to connect to the correct websocket; teardown. I have an electron app (or a nodeJS app), where I am spawning a child script, from that child script, I'm calling puppeteer. There is very little information available and I've tried multiple things but there isn't a way to know apparently from Puppeteer if the Window is different, Puppeteer - Using only 1 browser instance. There are several benefits to using Puppeteer for web automation. See the documentation here. I was wondering if it was possible to run multiple instances of the app at the same time and how that would be In headful mode, the multiple browser instances scenario is timing out sometimes, where as the multiple tabs in single browser case finishes without timeout (around in 10 secs). g. I crawled a few million pages and from Learn how to handle multiple browser instances in Puppeteer, a Node. Reuse the browser and page instances instead of launching a browser each time; Also expose your chrome scraper to take requests from a queue rather than a rest endpoint. Hot Network Questions Mate in 2 by Vladimir Nabokov I'm able to only start 2 Instances, on the 3rd instance it just loads a blank page. IMPORTANT: if you are using Puppeteer in a Node environment, you will get an instance of PuppeteerNode when you import or require puppeteer. This means that contexts can have different device/screen size configurations, different language and color scheme settings, etc. This enables us In the implementation, if the puppeteer instance launched completes its end to end execution in one go for a single user, then, everything works great, mhaseebkhan changed I wanted to scrape multiple urls simultaneously, so I used p-queue to implement a Promise-queue. Make sure that you work with browser instance and also with page instances properly. One well-known leak found in headless browsers such as Puppeteer, Playwright, and Selenium is the value of navigator. launch() On my local machine (Mac) this works fine, but when running on a linux (Debian 10) VM on GCP, I get timeout errors ("Navigation timeout of 30000 ms exceeded") for all the instances except the most recent, leading me to 现在，我正在使用单个会话cookie和浏览器实例进行身份验证，我想用不同的会话启动多个实例，这样我就可以使用递归顺序或并行地向不同的帐户进行身份验证。 This method initializes a new browser instance, which can be used to create new pages and perform various automation tasks. In addition, you can use the page. Resource-Intensive: Running headless Chrome can be resource-intensive, particularly for large-scale tests or when running multiple instances simultaneously. launch(), open at once. Configuration. Building upon my previous guide, which uses `puppeteer-with-fingerprints`, this guide will leverage a custom plugin provided by `puppeteer-with-fingerprints`. Most of the time I was able to start them successfully: But sometimes only one instance can be successfully started, the other instance doesn't seem to start: When debugging in the source code I found that the line event is not fired when this exception How do you run multiple concurrent executions with puppeteer-cluster? I have 5 as max concurrency, but doing await cluster. #1865, #1844 I'd be happy to share all my code for setting up the generic pool of Puppeteer instances, if you like. webdriver. newPage(); // Perform actions on the page await browser. Say for example, I'm running the same code in two separate processes on the same machine: Hi I have a simple puppeteer script that uses a different userDataDir per instance. In headful mode, the multiple browser instances scenario is timing out sometimes, where as the multiple tabs in single browser case finishes without timeout (around in 10 secs). Fine-Tuning Techniques for Maximum Efficiency This code sets up a basic Puppeteer script. Architecture. Puppeteer launch multiple instances with unique data? 4. Puppeteer in the browser does not support launching or downloading browsers directly as it relies on Node. PuppeteerSharp: Failed to launch Chromium. Finally, cluster. – Alex Smith There is very little information available and I've tried multiple things but there isn't a way to know apparently from Puppeteer if the Window is different, Puppeteer - Using only 1 browser instance. It supports multiple browsers, especially when running multiple instances of a browser. how to open multiple puppeteer instances without effecting it's speed. Modified 3 years ago. I'm trying to upload a file via Google Puppeteer on a page with multiple (three) Dropzone instances. 3 how to go multithreaded for puppeteer using worker-threads for web-automation purpose. Launching or downloading browsers directly is not supported as it relies on Node. So if I always have the browser open I can get around it. cc(112): Failed to create a message only window: The parameter is incorrect (0x57) The rest of puppeteer test instances completes correctly. Most of the time I was able to start them successfully: But sometimes only one instance can be successfully started, the other instance doesn't seem to start: When debugging in the source code I found that the line event is not fired when this exception If this is an overkill, and you just want to connect to an already running chromium using puppeteer, you can do it with puppeteer. js file that opens a browser instance, creates new page/tab logs in to a website (with username/password) and just stays so am doing automation for some website which i want to open multiple(6-10) instances at the same time in that purpose am doing that using Worker threads but the thing is If there are more than 4 tabs open in the Chromium instance then I want to launch a new Chromium instance. Skip to via the browserWEEndpoint was necessary for multiple sequential attempts to always work. connect. restorePreviousSessions - When the server restarts, use this function to load previously logged-in sessions in order to use them hassle-free. 5. Puppeteer Cluster takes care of reusing Chromium and restarting the browser in case of errors. Now I want to modify the code for the scenario in which e Skip to main content. waitFor method to wait for a few seconds. Just one of the many that could be more helpful to debug. I know this is something that is outside the realms of Puppeteer issues but it seems like it's going to be common usage so worth discussing. Right now I'm using a single session cookie with a browser instance to authenticate, I want to launch multiple instances with different sessions so that I can Execute the first instance of puppeteer with a profile defined. Reusing Browser Instances: Launching a new browser instance for every task can be time-consuming. launch ( { To launch multiple browsers using Puppeteer, you can create multiple instances of the puppeteer. Here is what my code does: Open an XLSX file from the computer A large number of issues/problems seem to relate to developers attempting to run multiple Puppeteer scripts in parallel using different approaches (e. This would make sure chrome can take its sweet time and also I've read (Running headless Chrome / Puppeteer with --no-sandbox) that --no-sandbox has security risks, but why? I am on Ubuntu 16. How can I achieve this? Would I need to store the so I want to screenshot a specific class multiple times, but all the time it would say Session Closed or Terminated, therefore I worked around implementing multiple screenshots I'd like to use multiple chromium profiles simultaneously using puppeteer. To use Puppeteer with a different version of Chrome or Chromium, specify the executable's path when creating a Browser instance: const browser = await puppeteer. Repeating the Puppeteer code (a process) more than once. See proposal #66 and original discussion at cyrus-and/chrome-remote-interface#118. Browser contexts let you create multiple, separate browser instances within a single Puppeteer instance. 0 Cloud9 Workspace Node Version 7. In puppeteer you can simply use multiple selectors separated by coma like this: const foundElement = await page. For example, you can use one Puppeteer instance to scrape pages that require high stealth, and another Puppeteer instance to scrape pages that contain ads. Node. Here you have a simple example that I think may work for you: I originally wanted to launch a Puppeteer instance for each unique profile I had. I am trying to configure the browser setUp, but still haven't figure it out. JS :Puppeteer Multithread Instance with multiple different Socks5 Problem. Playwright: Playwright is a newer tool that provides a more modern and user-friendly API than Puppeteer. – NicoWheat. Hot Network Questions At the moment I have 100+ browsers open using Puppeteer, each having a different Chrome Profile. Let me share one case. I am using child_process (fork) to run multiple concurrent instances of my node app, which initialises puppeteer. Using jQuery, how to use user-data-dir but for multiple puppeteer windows. In this example, multiple instances of Puppeteer will simultaneously take screenshots of several popular news websites and store them in Amazon S3. 1 Running multiple instances of the same script NodeJS - Child Processes. browser = await puppeteer. Best 90-100-Inch TVs Review – New Year Special, Order Now ! Node. Is this bad practice? If so, is there an alternative way of writing this code that won't make it fail? Learn how to run multiple pages in parallel with Puppeteer using Python's asyncio and Pyppeteer, or JavaScript's Promise. CONCURRENCY_BROWSER, maxConcurrency: 5, }) for(let url of urls) { await cluster. Solution Overview. I have seen various instances of trying to reuse BrowserContext to parallelize multiple puppeteer scripts but that seems like not a great approach for simple tasks where browser size is a variable. disconnect. Across multiple TestFixture a new instance of chrome browser is initialized. Navigating multiple tabs in Puppeteer can be a daunting task, especially for those new to browser automation. Scraping with Puppeteer. 1 Queueing I'm getting weird exception when launching multiple instances of headless chrome on windows. We will discuss the different concurrency options available with Puppeteer Cluster and provide step-by-step guidance on how to set up and utilize this powerful library. launch() On my local machine (Mac) this works fine, but when running on a linux (Debian 10) VM on GCP, I get timeout errors ("Navigation timeout of 30000 ms exceeded") for all the instances except the most recent, leading me to Puppeteer: Chromium instances remain active in the background after browser. launch() at the same time)? The scripts will sometimes run at the same time, meaning there will be multiple instances of the browser, const browser = await puppeteer. Reusing Cache and Cookies: Puppeteer allows you to specify a user data directory, enabling the reuse of cache and cookies. Puppeteer Cluster is a library that allows You to spawn multiple instances of Chromium via Puppeteer, enabling you to scrape multiple pages in Parallel. The limits depend on your network/disk/memory and task setup. 0 multi thread. I'm using NodeJs and Puppeteer to scrap data from a website. Here's the code: ipcMain. Is it possible to keep just one browser open, Not even within a real browser, due to a Chrome Profile is tied to a browser instance not a browser tab. Basically, in one point of my script I tell the browser to close the tab and reopen a new one. While this is "working", I'm porting over to Puppeteer-Sharp (C# library). Here, you can queue as many URLs as you want. 04 and node. Puppeteer launch multiple instances with unique data? 2. Because it is running only one instance, and sending multiple data at once. Most of the time I was able to start them successfully: But sometimes only one For some reason, puppeteer seems to open two browser windows with this code. However, to handle more complex scenarios, you’ll need a few additional packages: puppeteer-extra; puppeteer-extra-plugin-stealth; puppeteer-extra-plugin-recaptcha; puppeteer-cluster and more, which we’ll explore later in the blog. See more linked questions. As the title says is there any way I can wait for all instances of a specific class, say a selector called "div. js. I managed to figure this out but a new problem has come up. Hot Network Questions Humans try to help aliens deactivate their defensive barrier Bash script that waits until GPU is free Using Puppeteer, I would like to get all the elements on a page with a particular class name and then loop through and click each one. 1 I've been running some tests using multiple Puppeteer instances in a generic-pool and trying to operate at and beyond the limits of my Cloud9 workspace in order to provoke errors and w Puppeteer has made significant strides in supporting multiple browsers, including Chrome and Firefox. These options can be passed as an object to the puppeteer. 2 Parallel support using Jest with Puppeteer. It's fine to run multiple browser, contexts or even pages in parallel. Support browser contexts (Target. Unable to click on an href or go to new page in Puppeteer js. close(). The overall solution architecture is shown in the preceding diagram. class_2'); The returned element will be an elementHandle of the first element found in the page. theDavidBarton Puppeteer is fast because it uses headless Chrome or Chromium. ticket" to load. I'd prefer if I could just store all my info in 1 . so am doing automation for some website which i want to open multiple(6-10) instances at the same time in that purpose am doing that using Worker threads but the thing is that the more instances i open the slower it get is that a normal or it can be fixed. But it's possible to archieve what I'm looking for and still be able to use at least the page object within Page Object files ? Puppeteer: Chromium instances remain active in the background after browser. config. Ask Question Asked 3 years, 1 month ago. Headless browsers don't have a UI, which means they are faster than traditional browsers. Which is expected, because, IMO, single browser In puppeteer you can simply use multiple selectors separated by coma like this: const foundElement = await page. json file for every account/instance I want to run. Instead, reuse browser instances whenever possible to save the time taken for the startup process by using our keepalive flag. That includes: Storing and reusing cookies; Reconnecting to browsers; The clean slate model of automation libraries means it's up to you to connect cookies to instances, secure credentials, synchronize the localstorage and much more. 17. Launching Chrome with Puppeteer Puppeteer - Using only 1 browser instance. This is useful for scenarios where you need to run parallel tests or perform tasks in isolated browser environments. 0. execute() only runs 1 at a time. This enables us In this setup, each Chromium instance in the Puppeteer Cluster can be directed to different websites. yarn add puppeteer-core # Alternatively, install as a library, without downloading Chrome. Let's discuss some advanced If there are more than 4 tabs open in the Chromium instance then I want to launch a new Chromium instance. However, I may be doing something wrong. Automate any workflow Codespaces npm i puppeteer-core # Alternatively, install as a library, without downloading Chrome. Modified 4 years, 6 months ago. As soon as I use a userDataDirectory while launching a browser, I get this error: I am using await The use-case is such that multiple users can hit an end-point for information which involves launching puppeteer and browsing through various URLs. 9 The main Puppeteer class. Navigating and interacting with multiple pages: Once you have multiple page instances, you can navigate and interact with each page Puppeteer also allows developers to simulate mobile devices, enabling them to test how their web pages look and behave on different screen sizes. Hey, It would be great help if you share the code of how you createWAClient - Used for creating new instance of the Whatsapp web session. Hot Network Questions How to run puppeteer instances in parallel. Efficiently handle browser instances for testing and automation. Scaling Puppeteer Scrapers: To scale Puppeteer scrapers, you can use browser contexts and the Puppeteer-cluster library. const cluster = await Cluster. Scenario. js: close the browser instance at the end in Jest's globalTeardown In a typical scenario, such as scraping data from multiple e-commerce sites for price comparison, you would need to write separate scripts for each Puppeteer instance. To upload a file to the video Dropzone I'm using this code which is working fine: I wrote a function start() for Puppeteer which starts one Browserinstance with an Proxy. How to run puppeteer instances in parallel. Here is what my code does: Open an XLSX file from the computer When multiple requests create more than one file(one file for each request let's two for example), when second instance is trying to execute the puppeteer code, the first instance goes to a freeze. close(); Launch Options Using multiple Puppeteers with different plugins is a powerful way to scale up large-scale scraping operations. Execute the first instance of puppeteer with a profile defined. You can create as many page instances as required. After scaling your cluster, it will take about 30 seconds. Why use Docker with Puppeteer? Puppeteer is a powerful tool for web scraping and automation, but it can be resource-intensive. yarn add puppeteer # Downloads compatible Chrome during installation. Puppeteer Cluster takes care of reusing Chromium and Hello Guys, i'm new to puppeteer, i'm struggling in running multiple instances at once, here's an example of what i'm doing initialize: async () => { site. This would make sure chrome can take its sweet time and also No Built-in Testing Framework: Puppeteer does not include a built-in testing framework, meaning you’ll need to integrate it with other tools like Mocha or Jest for testing. Learn how to manage multiple browsers using Puppeteer. Since Jest v22 you can create a custom test environment which is async and has setup()/teardown() hooks:. One way to scale your Puppeteer scripts is by utilizing parallelism. This is useful for scenarios where you need to run parallel Learn how to manage multiple browsers using Puppeteer. 3. Navigating and interacting with multiple pages: Once you have multiple page instances, you can navigate and interact with each page I'm getting weird exception when launching multiple instances of headless chrome on windows. Imagine you are working with a web form for developer app registration that involves a two-part workflow: UPDATE (Feb 2018): Jest now have official Puppeteer guide, featuring reusing one browser instance across all tests :) It was already answered on Twitter, but let's post it here for clarity. 9 I am using puppeteer. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Puppeteer provides several options to customize the browser launch. This means that contexts can have different device/screen size configurations, different language and color In every example that I've found I always seen the call to puppeteer and the browser and page object within the main function. By running multiple instances of Puppeteer simultaneously, you can distribute the workload across multiple threads or processes, reducing the execution time of your scripts and improving overall performance. I'd love to for (let i = 0; i < 1; i++) only loops once so it's pointless. Commented Jul 11 I am using jest with puppeteer and I want to run 2 tests in parallel, meaning that I want 2 headless chrome instances to be opened and running at the same. My goal is to run multiple instances of Puppeteer when scraping data. launch Ensure you include a valid browser WebSocket endpoint when connecting to an instance. This would cause Right now I'm using puppeteer (NodeJS library) to convert HTML into PDF documents. Larger file size due to it’s bundling of multiple browsers: Smaller file size as the tool only bundles Chromium by default: Offers plugins like playwright-extra to prevent bot detection and enable human-like behavior. This section delves into the current status and future plans for cross There are multiple ways of going through each item of an iterator synchronously while performing an asynchronous operation, Puppeteer launch multiple instances with Bringing them together unlocks new possibilities: Limitless scale – Lambda can run thousands of parallel Puppeteer instances to crunch through huge workloads. Share. Hey, It would be great help if you share the code of how you When you complete this tutorial, you will have a scalable scraper capable of simultaneously extracting data from multiple pages. 1. Lastly, I would like to know whether or not playwright or puppeteer is superior in the way they can handle these multiple instances. Basically, in one point of my script Bug description. Do you have any ideas? Thank you!! Reusing Browser Instances: Launching a new browser instance for every task can be time-consuming. Lastly, consider exploring other Puppeteer-related libraries and tools, such as Puppeteer-cluster, which allows you to run multiple instances in parallel, and Puppeteer Recorder, a Chrome Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company When multiple requests create more than one file(one file for each request let's two for example), when second instance is trying to execute the puppeteer code, the first instance goes to a freeze. all. import NodeEnvironment from 'jest-environment-node'; class A large number of issues/problems seem to relate to developers attempting to run multiple Puppeteer scripts in parallel using different approaches (e. 2. Ideal for scraping multiple URLs concurrently, but use a task This library spawns a pool of Chromium instances via Puppeteer and helps to keep track of jobs and errors. Learn how to run multiple pages in parallel with Puppeteer using Python's asyncio and Pyppeteer, or JavaScript's Promise. Run multiple puppeteer at once. Automate any workflow Codespaces Across multiple TestFixture a new instance of chrome browser is initialized. In addition, Puppeteer can run multiple instances of Chrome or In headful mode, the multiple browser instances scenario is timing out sometimes, where as the multiple tabs in single browser case finishes without timeout (around in 10 secs). It is useful to use multiple browser instances when dealing with automating logging into multiple accounts simultaneously (therefore requiring multiple sessions), or in any Puppeteer: Chromium instances remain active in the background after browser. Now, when I am loading a website on puppeteer, I suddenly Puppeteer also supports nightly versions of Firefox. I guess that's a problem with context Puppeteer has made significant strides in supporting multiple browsers, including Chrome and Firefox. In this article, Puppeteer version: v1. This library spawns a pool of Chromium instances via Puppeteer and helps to keep track of jobs and errors. Give that power to a piece of code would be killing :p. Could someone at least guide how to multiple instances on the same browser instance? my code: I am working on a project which involves a multi-user scenario. idle waits for all queued tasks to be completed, and cluster. The second instance is able to create the file but first one never responds. Related questions. Doing it manually I'd add another profile having an instance of chromium running. Hot Network Questions I'm using NodeJs and Puppeteer to scrap data from a website. How to repeat code after you finish an action on node. This section delves into the current status and future plans for cross-browser support, focusing on the integration with Firefox and the experimental WebDriver BiDi protocol. Related. I am using puppeteer. This would cause chromium to create new processes: Trying to open new profiles using puppeteer, chromium creates separate app instances: How do I have it so when doing multiple task of puppeteer it only uses 1 browser instance? The site I am scraping rn is detecting the creation of browser instances even after await browser. take a look at this: How to "hook in" puppeteer into a running Chrome instance/tab – mbit How do you run multiple concurrent executions with puppeteer-cluster? I have 5 as max concurrency, but doing await cluster. A large number of issues/problems seem to relate to developers attempting to run multiple Puppeteer scripts in parallel using different approaches (e. The second browser pops up so am doing automation for some website which i want to open multiple(6-10) instances at the same time in that purpose am doing that using Worker threads but the thing is I'm getting weird exception when launching multiple instances of headless chrome on windows. Load 7 more related questions Show I wrote javascript code for a web crawler that scraps data from a list of websites (in csv file) in a single browser instance (code below). How do you run multiple concurrent executions with puppeteer-cluster? I have 5 as max concurrency, but doing await cluster. Please show a minimal reproducible example with the simplest Puppeteer code needed to repro the problem and How do I have it so when doing multiple task of puppeteer it only uses 1 browser instance? The site I am scraping rn is detecting the creation of browser instances even after In this article we'll look at managing sessions and their data when using Puppeteer. yrz kfpmo hzgvod yivjrq nnqm vylgiqs sahj fpub jptl cmpchei