JG-Browser

The Java-Graal Browser, is a headless browser with latest JavaScript support, completely written in Java.

JGBrowser browser = new JGBrowser();
try(JGWindow window = browser.openWindow()){
    window.load("https://example.com");
   // ...   
}

Important

Even though this browser has latest JavaScript support, browsers like Google Chrome, Firefox etc. provide additional JavaScript APIs, called Web-APIs, which practically every modern webpage uses.

Since this browser is meant to be completely written in Java, we must also write/implement all of those Web-APIs by ourselves.

For one person alone that would take decades, that's why this project is designed in a modular way, so that everyone can add the functionality that he/she needs. See how-to-implement-a-js-web-api.md for details.

In short, in its current state, this browser will fail executing most of the JavaScript code that relies on Web-APIs at the moment.

Links

• Checkout Headless-Browser, which has NodeJS and Playwright implemented into Java,
  if you want something production ready.

Installation

• Java 8 or higher required
• Steps for Maven/Gradle/Sbt/Leinigen
• Click on 'Watch' -> 'Custom' -> and tick the 'Releases' box to get notified of future releases

Motivation

HtmlUnit is good, but relies on another JavaScript engine with a lot less features that gets updated very rarely. Thus, this project exists. More details here, where I tried implementing GraalJS into HtmlUnit without success.

Features

• Latest JavaScript support via GraalJS
• Easy HTML handling with Jsoup
• Easy Web-API implementation
• Completely written in Java

Libraries

Note that this may be outdated. Check the pom.xml file for all dependencies.