Amber Smalltalk

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Amber Smalltalk
Amber Smalltalk Logo.svg
Original author(s) Nicolas Petton
Developer(s) Amber Community
Initial release 2011; 4 years ago (2011)
Stable release 0.14.2 / January 11, 2015; 8 months ago (2015-01-11)
Development status Active
Written in Smalltalk, JavaScript
Operating system Cross-platform
Type Object-oriented programming language, IDE
License MIT license

Amber Smalltalk, formerly known as Jtalk, is an implementation of the Smalltalk-80 language that runs on the JavaScript runtime of a web browser. It is designed to enable client-side development using the Smalltalk programming language.[1]

Amber includes an integrated development environment with a class browser, workspace, transcript, object inspector and debugger. Amber is written in itself, including the compiler, and compiles into JavaScript, mapping one-to-one with the JavaScript equivalent. Amber was created by Nicolas Petton.[2]

Amber was influenced by an earlier Smalltalk in browser project, called "Clamato", created by Avi Bryant.[2][3] Both Amber and Clamato use Parsing Expression Grammar (PEG) libraries for parsing Smalltalk sourcecode. Amber uses the JavaScript based PEG.js library[4][5] written by David Majda and Clamato uses PetitParser, a Smalltalk based library written by Lukas Renggli.[2] Both Clamato and Amber were influenced by earlier work by Dan Ingalls in developing the Lively Kernel implementation of Morphic in the web browser using JavaScript.[2][6]

See also[edit]


  1. ^ Smalltalk Implementations (brief comparative summaries describing Smalltalk dialects)
  2. ^ a b c d Schuster, Werner (August 22, 2011). "Smalltalk IDEs Come to the Browser: Jtalk, tODE, Lively Kernel 2.0". Retrieved October 20, 2011. 
  3. ^ "Clamato".  (Home page for the Clamato Smalltalk project)
  4. ^ "PEG.js".  (Home page for the PEG.js JavaScript parser generator project)
  5. ^ "Amber 0.9 Announcement".  (Announcement email of Amber 0.9 includes switch to PEG.js)
  6. ^ Shuster, Werner (June 22, 2010). "Dan Ingalls on the History of Smalltalk and the Lively Kernel". Retrieved October 26, 2011. 

External links[edit]