Library

Browser Driver Library:

• Browser Automation - Selenium - Headless browser - WebDriver / ChromeDriver (automated testing - W3C WebDriver API ) - Selenium/WebDriver focuses on cross-browser automation. Its value proposition is a single standard API that works across all major browsers.
• puppeteer focuses on Chromium; its value proposition is richer functionality and higher reliability.
• Headless Chrome
• PhantomJS – a headless web browser using WebKit layout engine for rendering web pages and JavaScriptCore for executing scripted tests.
• HtmlUnit – a headless browser written in Java (Rhino engine to provide JavaScript and AJAX)
• Geb - groovy browser automation… web testing, screen scraping and more
• http://casperjs.org/ based on
  • SlimerJS is similar to PhantomJs, except that it runs on top of Gecko, the browser engine of Mozilla Firefox instead
  • PhantomJS runs on top of Webkit,
  • http://triflejs.org/ API is coded as a port of PhantomJS. Internet Explorer browser that runs on top of the V8 engine
• https://electronjs.org/spectron for electron app

Proxy Script Injection:

• https://github.com/DevExpress/testcafe - TestCafe uses a URL-rewriting proxy which allows it to work without the WebDriver (selenium). This proxy injects the driver script that emulates user actions into the tested page.