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Amber Travis CI Status

By Nicolas Petton and Amber contributors

Amber is an implementation of the Smalltalk language that runs on top of the JavaScript runtime. It is designed to make client-side development faster and easier.


Amber is written in itself, including the parser and compiler. Amber compiles into efficient JavaScript, mapping one-to-one with the equivalent JavaScript. There is no interpretation at runtime.

Some highlights:

  • Amber features an IDE with a Class browser, Workspace, Transcript, a ReferencesBrowser supporting senders/implementors and class references, basic Inspector and even a beginning of a Debugger and a unit TestRunner.
  • Pharo Smalltalk is considered as the reference implementation.
  • Amber includes a canvas to generate HTML, like Seaside
  • Amber can use Javascript libraries and the current IDE is built on jQuery
  • You can inline Javascript code and there are many ways to interact between Amber and Javascript

Getting Amber

Amber is shipped as a npm package for its CLI tools and as a bower package for the client-side.

# Install the CLI tool `amber`
npm install -g amber

# Initialize your project as bower package
cd /path/to/myproject
bower init

# Load amber via bower in your project
bower install amber --save

# Serve amber on localhost:4000
amber serve

The Getting started page shows more details on ways to obtain Amber and start a project.

Building Amber

This step is only used by people developing Amber itself. Please refer to for further details. It explains the Amber development setup and how to contribute.


Amber is released under the MIT license. All contributions made for inclusion are considered to be under MIT.

More infos

More on the project page