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CasperJS vs Puppeteer: What are the differences?

<Write Introduction here>
  1. Execution Environment: CasperJS is built on top of PhantomJS, a headless browser, while Puppeteer is based on the Node.js library. CasperJS offers more high-level functionalities and automation scripts, whereas Puppeteer provides more control and flexibility in interactions with the browser.

  2. Language Support: CasperJS uses JavaScript as its scripting language, while Puppeteer allows users to leverage the full capabilities of Node.js, including using modern JavaScript features such as async/await. This makes Puppeteer more suitable for developers familiar with JavaScript and Node.js ecosystem.

  3. Community Support: Puppeteer has a larger and more active community compared to CasperJS, which results in more frequent updates, bug fixes, and new features. This community support can be crucial for resolving issues or finding resources when working with the tool.

  4. Headless Mode and Browser Options: Puppeteer natively supports headless mode, offering better control over browser options and configurations, while CasperJS requires additional setup to run in headless mode. This makes Puppeteer a more suitable choice for headless browsing scenarios.

  5. Performance: Puppeteer typically has better performance compared to CasperJS due to its underlying architecture and optimized APIs. This can be crucial when dealing with large-scale automation tasks or performance-sensitive applications that require faster execution times.

  6. Official Support and Documentation: Puppeteer is developed and maintained by Google Chrome team, providing official support and comprehensive documentation, ensuring that users have access to reliable resources and updates. CasperJS, on the other hand, may have less official support and documentation available.

In Summary, CasperJS and Puppeteer differ in their execution environment, language support, community backing, headless mode capabilities, performance, and official support/documentation.

Advice on CasperJS and Puppeteer
Ankur Loriya
Needs advice
on
PhantomJSPhantomJS
and
PuppeteerPuppeteer

I am using Node 12 for server scripting and have a function to generate PDF and send it to a browser. Currently, we are using PhantomJS to generate a PDF. Some web post shows that we can achieve PDF generation using Puppeteer. I was a bit confused. Should we move to puppeteerJS? Which one is better with NodeJS for generating PDF?

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Replies (2)
Recommends
on
PuppeteerPuppeteer

You better go with puppeteer. It is basically chrome automation tool, written in nodejs. So what you get is PDF, generated by chrome itself. I guess there is hardly better PDF generation tool for the web. Phantomjs is already more or less outdated as technology. It uses some old webkit port that's quite behind in terms of standards and features. It can be replaced with puppeteer for every single task.

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Recommends
on
PuppeteerPuppeteer

I suggest puppeteer to go for. It is simple and easy to set up. Only limitaiton is it can be used only for chrome browser and currently they are looking into expanding into FF. The next thing is Playwright which is just a scale up of Puppeteer. It supports cross browsers.

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Pros of CasperJS
Pros of Puppeteer
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    • 10
      Very well documented
    • 10
      Scriptable web browser
    • 6
      Promise based

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    Cons of CasperJS
    Cons of Puppeteer
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      • 10
        Chrome only

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      - No public GitHub repository available -

      What is CasperJS?

      CasperJS is a browser navigation scripting & testing utility written in Javascript for PhantomJS or SlimerJS.

      What is Puppeteer?

      Puppeteer is a Node library which provides a high-level API to control headless Chrome over the DevTools Protocol. It can also be configured to use full (non-headless) Chrome.

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      What are some alternatives to CasperJS and Puppeteer?
      PhantomJS
      PhantomJS is a headless WebKit scriptable with JavaScript. It is used by hundreds of developers and dozens of organizations for web-related development workflow.
      Selenium
      Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that. Boring web-based administration tasks can (and should!) also be automated as well.
      Cypress
      Cypress is a front end automated testing application created for the modern web. Cypress is built on a new architecture and runs in the same run-loop as the application being tested. As a result Cypress provides better, faster, and more reliable testing for anything that runs in a browser. Cypress works on any front-end framework or website.
      SlimerJS
      It allows you to manipulate a web page with an external Javascript script: opening a webpage, clicking on links, modifying the content... It is useful to do functional tests, page automation, network monitoring, screen capture etc.
      Protractor
      Protractor is an end-to-end test framework for Angular and AngularJS applications. Protractor runs tests against your application running in a real browser, interacting with it as a user would.
      See all alternatives