What is a Headless Browser?

A headless browser is a GUI-less tool for web developers, enabling automated webpage testing and scraping. It allows interaction with webpages programmatically for tasks like automated testing, web scraping, and server-side rendering, enhancing efficiency and security in web development.

They are especially helpful for testing web pages because they can render and comprehend HTML as a browser can, including style features like page layout, color, font choice, and JavaScript and Ajax execution that are typically unavailable when using other testing techniques.

Usage of Headless browser:

• Modern online applications now include test automation (web testing)
• Making web page screenshots
• Automating the testing of JavaScript libraries
• Automating how web pages interact

To perform website testing on a Headless browser with cloud testing platforms like LambdaTest, you need to add the capability for a Headless browser. You can do it by visiting Desired capabilities generator, as shown in the screenshot below:

Also, while writing desired capabilities in your test script, add this code for the headless browser.

capabilities.setCapability("headless",true);