Nodejs Headless Browser


Also note that I add dumb-init; it saves you from a lot of pain and annoyance, like when you're trying to use Ctrl+C to stop your container. Due to its speed, accuracy and easy to access features, HTML unit driver and PhantomJS are gaining popularity for headless browser testing. Enter Mocha and Chai. Unlike trying to use Chrome, Firefox, Safari or the like for running our tests, PhantomJS is a lightweight browser that is platform agnostic. Hence, if any tests are executed with the headless browser so action performed. Testing with headless browser (Zombie. js uses as a browser to interact with web sites. The only difference here is that there is no Graphical User Interface (GUI) and they are usually executed from the terminal. js (previously known as node-webkit) lets you call all Node. performance of your script we can try some testcases using Headless browser Testing using Selenium. 14 seems to be the version number for Node. Heroku CI provides installation options for testing against Google Chrome (headless),. js is used to build fast, highly scalable network applications based on an event-driven non-blocking input/output model, single-threaded asynchronous programming. I'm trying to put list of possible solutions for browser automatic tests suits and headless browser platforms capable of scraping. Let's examine each of these in turn. WebDriver does not use this technique. The input is a JSON object and output is a PDF. Nightmare is my headless browser of choice. Then publish the results for the build to VSTS with these steps: Install a headless browser testing driver such as headless Chrome or Firefox, or a browser mocking tool such as PhantomJS, on the build agent. It looks to me that it might be OS version specific – in Raspbian Stretch (not sure about earlier revisions of it, but at least in the one I used – Raspbian Stretch (2019-04-08) Lite), Wi-Fi configuration in headless mode might have become simpler. I am in the process of starting a new project, that I would like to use a headless/decoupled approach. Web browser. For simulating browser-side operations, such as moving cursors and updating formulas, we used Zombie. 04 - Jenkins_Protractor_Headless_Chrome_Setup_Ubuntu_14. A Guide to Automating & Scraping the Web with JavaScript (Chrome + Puppeteer + Node JS) we create our browser and set headless mode to Learn Node JS — The 3. If your host has only USB 3, you will likely need to use Windows (at least as of February 2014, the USB 3 drivers on Linux were very flaky). js developers A powerful, yet simple platform that allows you to define the data schema of your app, and write your own REST API right from your browser. To download the full package of Intern you must install NodeJS on your system firstly and add NodeJS installation directory to "PATH" system environment variable. Strapi is an open source headless nodejs CMS. It can be used to automate things that normally performed manually in the browser, such as submitting forms, UI testing, keyboard input, or capturing a timeline trace to diagnose performance. Net awesomeSites Blogging BOOK Bootstrap Browser c# chrome COM Comp Hardware CSS CUSTOMIZATIONS DarkNet Database Debugging Design Patterns Eclipse Editors&IDEs Excel GameDev Git GitHub Google Graphics H2 HTML hybridApp IIS iOS javascript Jive JQuery Linux Mainframe Memory Misc. browserless, a puppeter-like Node. One major use case of PhantomJS is headless testing of web applications. Testing in Headless Mode. Then publish the results for the build to VSTS with these steps: Install a headless browser testing driver such as headless Chrome or Firefox, or a browser mocking tool such as PhantomJS, on the build agent. But it does not have a GUI(Graphical User Interface). js library maintained by Chrome's development team from Google. The number of dependencies these tools install completely eclipse my regular non-dev tools. A headless Node. js ideal for task automation Javascript A headless browser powered by PhantomJS functions in Node. Strapi is also suitable for developing systematic and well-configured web and mobile applications. On the top bar, click on your account and under the Directory list, choose the Active Directory tenant containing the TodoListService-Headless application. There are various (some successful, some failed) adapters for bridging DevTools Protocol to IE, Edge, Firefox, Safari etc. js Lambda example function in detail. Handy isn’t it? The power behind this module is PhantomJS, a Webkit based headless browser. Quick Tip: Getting Started with Headless Chrome in Node. js in Chrome DevTools. SuperCharged End 2 End Testing with WebDriver & Puppeteer. You want all your logs in a centralized, easily searchable place. Can act as a. 97% better than the UI version. If there is something I am missing, please tell me because I don't know if what I want to do is possible, as It is the frist time I work with this kind of technology. Make sure that billing is enabled for your Google Cloud Platform project. This article has been updated to cover the installation of both Raspbian Buster and the latest version of Node at the time of this writing which is Node. Karma, Mocha, Chai, Headless Chrome, oh my! Karma is a testing harness that works with any of the most popular testing frameworks (Jasmine, Mocha, QUnit). If you are looking for a browser that is just a Text UI I would recommend Lynx (sudo apt-get install lynx). Puppeteer is Google's official npm module for controlling Chrome from Node. Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Puppeteer is Node. Working through the examples in this guide, you will learn all the tips and tricks you need to. It has long been rumored that Google uses a headless variant of Chrome for their web crawls. But it does not have a GUI(Graphical User Interface). js headless browser) Posted by: admin November 29, 2017 Leave a comment. The world's most popular modern open source publishing platform. A headless browser is a web browser without a graphical user interface. SuperCharged End 2 End Testing with WebDriver & Puppeteer. The server-side export is a minimal example of how to export the graph using an external service hosted on a server. Web scraping is useful for a variety of applications. Learn to scrape the web using Cheerio to extract all the API endpoint URLs from the web page. How do I use it?. js (any other alte…. Start using PhantomJS from cmd. Web scraping is useful for a variety of applications. What is Node. Ip2region is a offline IP location library with accuracy rate of 99. Currently it is hard to know what may have caused a failure that is not. js library that allows you to control Google’s Chrome or Chromium browser, can be used for taking screenshots of websites. Put the cookies back in the cookie jar 🍪 Scraping with a full-featured browser gives you peace of mind. Installing to a Single Project. js Weekly Update - 18 August. How do I use it?. It access Web Pages but doesn't show them to any human being. How to Hide URL in address bar of any browser? Jan 20, 2012 07:29 AM | shubhadeepchat | LINK I have an web application where i want to hide the URL which shows in the addressbar in the browser. Run tests in headless browsers as part of your pipeline with tools like Protractor or Karma. Selenium Node Adapter. It also enables you to run Chromium in headless mode (useful for running browsers in servers) and can send and receive requests without the need of a user interface. A headless browser, like a normal browser, consists of all the capabilities of rendering a website. Running the Tests in the Headless Browser. I have mentioned using CasperJS for screenshots previously, the awesome navigation scripting and testing utility for PhantomJS (headless webkit browser for NodeJS), but I wanted to. So far, so easy. “To help our customers build such digital experiences with headless Drupal, we added Node. A few months back, I wrote a popular article called Making Chrome Headless Undetectable in response to one called Detecting Chrome Headless by Antione Vastel. Update the Active Directory tenant application registration for TodoListService-Headless. PhantomJS is a discontinued headless browser used for automating web page interaction. What is node. Note that the addArguments('--headless') is the parameter that should make the navigation silent, but apparently it's not working or I am missing something I am not aware of. js headless browser) Posted by: admin November 29, 2017 Leave a comment. Just as it might sound, Firefox is run as normal, minus any visible UI components visible. $ casperjs sample. So, let’s just do this!. Loves climbing, cognitive science, code, & cat gifs. JS Puppeteer API Stub a browser environment in node. Functional Testing For Node. js using nvm, the Node. However, the foundational way it does this is through DevTools Protocol. The Browser then decodes the MPEG stream in JavaScript and renders the decoded pictures into a Canvas Element. Keep this in mind as you evaluate popular headless browsers. 0x millseconds searching performance. Here are step by step instructions for installing a headless Selenium server with Chrome and Vagrant. js selenium-webdriver headless-browser or ask your own question. Headless Chrome. Selenium-RC worked the same way for each supported browser. Testing with headless browser (Zombie. Effective way to implement cross browser acceptance test to manipulate HTTP requests and responses, capture HTTP content and performance data. A perfect use case for this library is scraping. Instead of crafting web sockets payloads, calling an API will automatically. js In Agile development, developers write tests before implementing a feature. Surprisingly for me, the Edge browser totally beats all of them. If your host has only USB 3, you will likely need to use Windows (at least as of February 2014, the USB 3 drivers on Linux were very flaky). Although headless systems CAN have a Text UI as it is just text. It runs on Windows, macOS, Linux, and FreeBSD. What would it take to just forward code to the traditional v8 as in Node. x: If your application or one of its libraries requires a DOM (which can be specified with jsDependencies += RuntimeDOM), the JSDOMNodeJSEnv environment described will be used by default. Puppeteer is a node. The tests can become slower when targeting multiple browsers with lots of tests. js Example Script for Android Mobile Application Tests. Brendan Dahl has previously described how to use SlimerJS to drive headless Firefox. Installation. 04 - Jenkins_Protractor_Headless_Chrome_Setup_Ubuntu_14. js will execute, and will set up a type of loop. Headless systems cannot have a GUI and therefore, no you cannot have a GUI browser on a headless system. Launch chrome; Open a new tab in the browser. This tool is a high-level Node. With those two, you can completely automate the usage of Chrome on the server-side. Read the Browserify Handbook; Use many of the tens of thousands of modules on NPM in the browser Use watchify, a browserify compatible caching bundler, for super-fast bundle rebuilds as you develop. class: center, middle, inverse, title-slide # Headless Chr. 1 seconds later you see the new color in your browser. On the applications tab, select the TodoListService-Headless application. In scenarios where an attacker has a privileged network position, it is possible to intercept the response and replace the executable with a malicious one, resulting in code execution on the system running headless-browser-lite. I also want to show you how to troubleshoot those rare moments when there’s an issue on the CI but not on your local build, by using Codeship’s SSH. mongoDB MQ MVC Networking. Ip2region is a offline IP location library with accuracy rate of 99. js 에서 사용하는 가장 쉬운 방법은 chrome-remote-interface 에 기존의 wrapper를 사용하는 것이다. Here is a quick tutorial showing how to get started with talking to your NodeJS script. While every language has some benefit over. Headless is a Node. The table contains the supported browser and the respective browser drivers. Hi, I’m trying out headless-gl to render a simple scene, but I get differences between the rendered image in the browser and in headless-gl. js: cargo test --target wasm32-unknown-unknown Debugging Headless Browser Tests. Web browser. npm install [library name] you can also use npm uninstall [library name]. This makes UI testing easy: your client-side app runs in a real browser, no need to worry about the painful quirks of Jest attempting to mimic a browser in Node. Headless browsers are designed for tasks like automation testing. The headless Chrome is useful for browser automation. WedriverJs supports the below browsers. It does browser testing with browser automation (think JsTestDriver), QUnit style static HTML page testing, testing in headless browsers (PhantomJS, jsdom), and more. While advanced optimizations does apply performance related optimizations, these are now largely obviated by optimizations present in modern JavaScript virtual machines like V8, SpiderMonkey, and JavaScriptCore. js Lambda function in the Console editor. Set Up A Headless Deluge Server on Linux. on my desktop its simple the ng e2e command to run the tests. Webdriverjs is packaged as 'selenium-webdriver' under npm package which runs on nodejs. performance of your script we can try some testcases using Headless browser Testing using Selenium. Configure PhantomJS 1. The program of iJS with various Workshops Sessions Keynotes | International Javascript Conference, October 21 - 25, 2019 in Munich Open Menu Program. Browser automation helps you to automate repetitive tasks and web application testing. Puppeteer automates headless / visible Chrome today. This tutorial will help you Use Google Chrome Headless Features on Linux command line. The other headless driver PhantomJS delivers 34. Your #1 resource in the world of programming. On the top bar, click on your account and under the Directory list, choose the Active Directory tenant containing the TodoListService-Headless application. You want a lightweight solution with very little draw on resources so that you can run it in the background without slowing down development work, but the same solution must allow you to execute every test necessary to simulate the expected actions of target users. js, which you need to install separately. With Electron, you’ll have access to Chrome’s rendering engine as well as the ability to use nodejs packages. However, Gzweb is a thin client in comparison, and lets you interact with the simulation from the comfort of a web browser. Headless mode is a very useful way to run Firefox. In fact, by leveraging application caching, you could have the browser completely stop talking to your own server, even on future requests. One thing has been harder to coin though: handling the download of a file and hand it over to Node. The headless mode of Chrome performs 30. Our code then instructs the headless browser to take a screenshot of the web page and save it to our file system as a PNG or PDF file. Headless Chrome is instead controlled by scripts written by software developers. js since Node. These programs behave just like a browser but don’t show any GUI. A headless browser is simply a browser just without any user interface. Introducing Chrome Debugging for VS Code. Best way to install and keep up-to-date with Google Chrome browser is use Google’s own YUM/DNF repository. js and Angular frameworks. js ships with and uses PhantomJs. You should see something like this. Strapi is the most advanced open-source Node. A headless browser is a browser simulation program that does not have a user interface. This is a lot easier in a real browser which you can interact with via a REPL. After this I have a node script that looks like this:. A few months back, I wrote a popular article called Making Chrome Headless Undetectable in response to one called Detecting Chrome Headless by Antione Vastel. In the past, you may have used PhantomJS to achieve your browser automation tasks, however Chrome headless runs faster and also consumes less memory. js and other related modules. Brendan Dahl has previously described how to use SlimerJS to drive headless Firefox. The other headless driver PhantomJS delivers 34. In fact, by leveraging application caching, you could have the browser completely stop talking to your own server, even on future requests. Under the hood, Selenium talks to ChromeDriver (a standalone server that implements WebDriver’s wire protocol) which uses DevTools Protocol to control the browser. Browserless is a great browser-as-a-service tool that just works. How to Make Simple Node. Surprisingly for me, the Edge browser totally beats all of them. It's basically a browser which you can run from Node. Strapi is an open source headless nodejs CMS. We do this through an open governance model that encourages participation and technical contribution, and by providing a framework for long term stewardship by an ecosystem invested in Node. What is Puppeteer? Puppeteer is Node library that you can use in order to control Headless Chrome with the DevTools Protocol. JavaScript is a programming language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else. If you are looking for a browser that is just a Text UI I would recommend Lynx (sudo apt-get install lynx). Questions: Are there any headless browsers for node. js programs inside Chrome DevTools. js, and Mocha Overview Use automated tests to keep your web app rock solid and bug-free while you code Use a headless browser to quickly test your web application every time you make a small change to it. js development. js + Jasmine) posted in Nodejs on 2012-10-14 I was planning to post this article a few weeks ago, but today I finally finished the examples and I can't wait to share it. In this post, we’ll go about setting up the Raspberry Pi to access internet through the RasPi’s Ethernet/LAN port from a Laptop/PC’s shared WiFi connection. How to Make Simple Node. HeadlessDevToolsClient - Provides a C++ interface for inspecting and controlling a tab. What is node. It also supports Electron to run your tests in the latest Chromium/V8 environment. This is useful since when running tests, especially in a CI environment, there is nobody “watching” the visuals, so there is no need to have the extra overhead of the browser GUI. The rumor is that the new headless mode of Chrome is both faster and less memory intensive than PhantomJS. Using screenshots is a great solution to check if the data extracted is. We are considering that reader knows about the automation testing. Actually, you need two types of browser test. 0) Image export formats: PDF (exact export of browser as seen on PC/MAC) What can be exported: Gantt, Roadmap, Resources, Risks. If you have ever used gnuplot, the system would operate similarly to a set terminal svg. Usage of a debugger;. This new feature comes with some breaking changes that will allow us future scalability. PhantomJS is a discontinued headless browser used for automating web page interaction. We found that 3% of them (1 request) were addressed to the original Griffin. js Complete Reference Guide is your one-stop solution to building highly scalable, single-language applications that share code between the server and client Node. js and ensure you have the puppeteer module installed via npm. Other than that the headless behaves the same as the traditional browsers like (Chrome, Firefox, MS-edge etc. Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways. js file is the file that Node. We're really more interested in sharing the concepts here. What is Node. All of the commands contributed by this extension are prefixed with "iot:" To see a list of commands that are contributed by this extension press F1 and then type iot. So far, so easy. How to Gracefully Handle Failures in a NodeJS API Client Posted by Jake Lumetta on October 9, 2017 There are two facts of life: you breathe air, and errors will occur in your programs. A special thing about this framework is that it's tailored to be used with headless browser engines (PhantomJS or SlimerJS). The recording below shows setting breakpoints within an HTTP. Selenium Node Adapter. Headless is a Node. running the Chrome browser but without displaying its window basically. Things which are similar in behaviour and functioning but still different. A headless browser is an app that renders a web page (and executes its script) without displaying the page to a user. Headless Browser is a Web Browser without a GUI (Graphical User Interface). It has some nice properties: It uses a table to generate the layout; an easy way to align texts vertically and “draw” rectangles that are aligned. How to Make Simple Node. With Intern you can run Javascript unit tests on TestingBot's browser grid. Perfect for test automation. It provides a headless chrome API for NodeJS applications. One of the biggest differences between the two browsers is that, while Chrome is. The Chromium Embedded Framework (CEF) is an open-source software framework for embedding a Chromium web browser within another application. performance of your script we can try some testcases using Headless browser Testing using Selenium. dotCMS Hybrid CMS is ideal for managing Single Page Apps, Progressive Web App, Websites and Intranets. js wrapper for Xvfb, the virtual framebuffer. A presentation created with Slides. Chrome itself doesn't have a headless mode(updated:see comments, now it does), but you can start something like Xvfb (a framebuffer not connected to display hardware. Furthermore, there’s the Puppeteer Node module, which is a library to control Chrome. There are 2 versions of JDK. This article will guide you about the pros and cons of testing in Headless browsers over Real browsers. The Browser then decodes the MPEG stream in JavaScript and renders the decoded pictures into a Canvas Element. Your #1 resource in the world of programming. js is a node. PhantomJS is a headless WebKit browser, and GhostDriver is an implementation of the WebDriver Wire Protocol that's built into PhantomJS. $ casperjs sample. A headless browser, like a normal browser, consists of all the capabilities of rendering a website. 참고: 이제 Google의 puppeteer 도 있다. The latest Tweets from headless lamarr (@zeigenvector). Made by developers for developers. Once you see this happening, congrats, you’re running in debug mode in Node. Posts about Headless browser written by Khyati Sehgal. Means, you can not see browser on the screen. Wallaby supports lots of technologies, and we have a collection of sample projects with configuration files for different tools, frameworks and languages such as Jasmine, Mocha, QUnit, Jest, Webpack, Browserify, ES6 and ES7 via Babel, TypeScript and CoffeeScript, React and Angular, node. Puppeteer is a Node library which provides a high-level API to control Chrome or Chromium over the DevTools Protocol. A few months back, I wrote a popular article called Making Chrome Headless Undetectable in response to one called Detecting Chrome Headless by Antione Vastel. I imagine Headless Chrome will make this obsolete shortly but just in case anyone wants to play with it, here is Dullahan - A headless browser SDK that uses the Chromium Embedded Framework (CEF). Headless browsers can provide control of a web page in an environment similar to the popular web browser, but widely executed using CLI (Command Line Interface) or over the network communication, hence allowing automation. New Firefox Binary; Add CLI Argument --headless; New Firefox Options with Binary as Param. js”, for part one, click here. I know zombie. In Programmer's term, Puppeteer is a node library or API for Headless browsing as well as browser automation developed by Google Chrome team. NET port of the official Headless Chrome Node. A light-weight Selenium RC client for NodeJS. Headless Browser là một trình duyệt web không có giao diện đồ họa người dùng. documentation > remote-access Remote Access. Puppeteer runs headless by default, but can be configured to run full (non-headless) Chrome or Chromium. js application running (daemonized) on a headless Raspberry Pi that deals with requests through an Nginx Reverse Proxy Server. There are 2 versions of JDK. Headless systems cannot have a GUI and therefore, no you cannot have a GUI browser on a headless system. js x Headless Chrome for WeRTC MCU / Node. Alexander Feiglstorfer. Web browser. js to connect to our running Chrome Canary instance. Put the cookies back in the cookie jar 🍪 Scraping with a full-featured browser gives you peace of mind. In Programmer's term, Puppeteer is a node library or API for Headless browsing as well as browser automation developed by Google Chrome team. Headless is a Node. Home » Nodejs » How to install Zombie JS on Windows 7? (node. Our code then instructs the headless browser to take a screenshot of the web page and save it to our file system as a PNG or PDF file. Now let’s install the NodeJS package if this is the case:. Headless Chrome has recently entered stable public release and within a few months since the insider word got out, we have seen many new approaches that leverage on headless Chrome. acquiring the data using an HTML request library or a headless browser, and parsing the data to get the exact information you want. 162651361 0 5 65 4 72 22 3 9 5 5 6 0 1 4 3 5 1 1 1 1 1 1 1 1 1 1 3 2 2 2 2 2 2 2 1 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 11 10 1 3 3 6 8 8 9 7 8 6 5 9 8 8 7. It can be used to control Headless Chrome over the DevTools protocol. Simple installation of NodeJS, PhantomJS, and CasperJS Last updated on October 14, 2012 in Development I have mentioned using CasperJS for screenshots previously, the awesome navigation scripting and testing utility for PhantomJS (headless webkit browser for NodeJS), but I wanted to cover something that can be a bit painful at times: installation. This tutorial assumes you have a fair knowledge of HTML and the DOM and Javascript (Node. js features offered by its run-time environment helps developers in building applications with real-time collaborative editing & drawing. js uses complex techniques and can therefore be confusing to work with. Live reload. net Android AngularJS Architecture Asp. “To help our customers build such digital experiences with headless Drupal, we added Node. $ casperjs sample. This tutorial teaches how you can build, structure, test and debug a Node. Webscraping in NodeJS Without a Headless Browser "because everyone. It is suitable for general command-line based testing, within a precommit hook, and as part of a continuous integration system. main script is executed in node. js with selenium-webdriver. js that supports in-context editing, schema-driven content types, flexible widgets, and much more. Headless WebKit and PhantomJS If you're reading this article, you most likely know what a browser is. End-to-end browser testing. js library for interacting with Headless production scenarios. js, simple or none optimizations suffice. a puppeter-like Node. const browser = await puppeteer. js fills a particular need: building fast, scalable network applications, as it's capable of handling a huge number of simultaneous connections with high scalability. buttons at the top center of the IDE. This new feature comes with some breaking changes that will allow us future scalability. Heroku CI provides installation options for testing against Google Chrome (headless), Heroku CI provides public beta-level support for browser testing, or 'user acceptance testing' (UAT). Here we will cover: A quick introduction to browser automation: How it’s typically done & use cases. The headless browser is only a web browser without graphical user interface. I am exploring the possibility of using geogebra in nodejs, that is to say without the need of x11 nor a browser window. If you burned the image successfully, you should see a folder named boot appear. performance of your script we can try some testcases using Headless browser Testing using Selenium. Managing large-scale JavaScript projects can be challenging, as you need to guarantee that the pieces fit together. I imagine Headless Chrome will make this obsolete shortly but just in case anyone wants to play with it, here is Dullahan - A headless browser SDK that uses the Chromium Embedded Framework (CEF). js' success. Under the hood, Selenium talks to ChromeDriver (a standalone server that implements WebDriver’s wire protocol) which uses DevTools Protocol to control the browser. Headless Firefox in Node. I recently had a go with Headless Chrome and Puppeteer to download bank account statements. js developers A powerful, yet simple platform that allows you to define the data schema of your app, and write your own REST API right from your browser. js on the server, you may have been thinking about using a canvas module, such as Automattic/Canvas or run a headless browser such as Phantom or even a full-blown Firefox or Chrome on xvfb. js CMS I know of, that has a frontend admin interface. Chromium is an open-source browser project that forms the basis for the Chrome web browser. js library for interacting with Headless production scenarios. You want a lightweight solution with very little draw on resources so that you can run it in the background without slowing down development work, but the same solution must allow you to execute every test necessary to simulate the expected actions of target users. Then publish the results for the build to VSTS with these steps: Install a headless browser testing driver such as headless Chrome or Firefox, or a browser mocking tool such as PhantomJS, on the build agent. Hi Gregor, It is an issue that I haven’t faced when setting up my Rapsberry Pi Zero W – thank you for this valuable comment and notes. It is a library that allows you to control a headless browser from a Node. js In Agile development, developers write tests before implementing a feature. There are many headless. Mocha is a flexible testing framework (an enabler of test suites, so to speak) that is usable in a browser or Node. Headless browsers:. js, which you need to install separately. The project is maintained by the Chrome DevTools team and has an excellent API that is super easy to work with. Testing with headless browser (Zombie. And, although it doesn’t currently offer support for Selenium, it uses Chromium and. Get confused? It's as simple as that - a Software that can access web pages but it's not showing the contents anywhere. A headless browser, like a normal browser, consists of all the capabilities of rendering a website.