Lightweight bridge for calling Cocoa frameworks from Mozilla JavaScript, js-macosx transparently handles definition of Cocoa API, both C and Objective-C, and provides automatic declarations for framework functions, structures, constants and enumerations, as well as allows creating and subclassing Cocoa classes.

The js-macosx bridge has dependency on js-ctypes and BridgeSupport. Whenever a Cocoa class, function, struct or const is encountered in the JavaScript code, js-macosx will replace it with the corresponding js-ctypes declaration based on the BridgeSupport file from the framework that object belongs to.

• Introduction
• Using js-macosx, Step by Step
• Importing System Frameworks
• Importing Other Frameworks
• Working with Cocoa Objects
• Subclassing Cocoa Classes
• Converting Cocoa and JavaScript Objects
• Known Issues and Limitations

Download, extract and install Demo extension for Thunderbird or Firefox v18.0 or later, and check out Error Console to see some functionality of Mozilla JavaScript-Cocoa Bridge for macOS in action.