IGJavaScriptConsole 0.1.3

IGJavaScriptConsole 0.1.3

LangLanguage Obj-CObjective C
License MIT
ReleasedLast Release Dec 2014

Maintained by Francis Chong.

Depends on:
CocoaHTTPServer~> 2.3
JavaScriptCoreOpalAdditions~> 0.3.0
CocoaLumberjack>= 1.6.4

  • By
  • Francis Chong

A JavaScript/Ruby REPL for your Objective-C apps.


Check the blog post for more details.


With iOS 7 shipped with JavaScriptCore, we can now run Opal (a JavaScript based ruby implementation) on iOS to extend the app dynamically.

Theres one major problem however, to compile the Ruby to JavaScript, then compile the app, install it and run takes a lot of time. What if we have a REPL that let us dynamically define and run Ruby code and run on device or simulator in realtime?


  • Opal A Ruby to JavaScript compiler. It even come with sprockets extension which lets you bundle the compiled script easily.
  • JavaScriptCoreOpalAdditions A thin layer of Objective-C that load and provides native features to Opal.
  • jqConsole Web based terminal.
  • Ace Web based code editor with syntax highlighting.
  • CocoaHTTPServer HTTP and WebSocket server for realtime communication between iOS and desktop.


Add following lines to your Podfile:

pod 'IGJavaScriptConsole', '~> 0.1.3'


To start a console, create a server by supply a JSContext and language.

#import "IGJavaScriptConsoleServer.h"

NSError* error;
self.server = [[IGJavaScriptConsoleServer alloc] initWithContext:context
self.server.port = 3300;
if (![self.server start:&error]) {
    DDLogError(@"error: %@", error);

Connect your browser to your device at 3300 port (e.g. http://localhost:3300) to connect to the console.


MIT License. See License.txt.