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Last updated at 6:53 pm UTC on 22 November 2023
Seaside is a framework for developing sophisticated web applications in Smalltalk. (Squeak, Pharo and Gemstone).

Developers: Avi Bryant, Julian Fitzell and many, many, others over the years.

Outstanding feature

The most unusual feature of Seaside is its approach to session management: Seaside models an entire user session as a continuous piece of code, with natural, linear control flow. Pages can call and return to each other like subroutines. Complex sequences of forms can be managed from a single method. Objects are passed by reference rather than marshalled into URLs or hidden fields. Seaside fully supports the backtracking and parallelism inherent to the web browser.
So unlike in the Java servlet model Seaside does not need a separate handler for each page or request.

Other features


The Seaside project has a mirror on GitHub which is tested by TravisCI.

Seaside status November 2016 (Squeak 5.1)
Seaside status November 2018 (Squeak 5.2)
Seaside Status November 2023 (Squeak 6.1)

How to get Seaside into a standard image


Earlier versions of Squeak:
SqueakMap ==> go here for details

The load scripts also load Grease.

To check the installed Seaside version
 GRPlatform current seasideVersion greaseString
'3.5.4' as of November 4th 2023.

Mailing list






2009 and older material

The information below is as of 2009 and may be outdated.

Please note: previous versions of Seaside included a sample application, the Sushi Store. This application has not been updated and is no longer included with Seaside 2.8 - it is still available at http://www.squeaksource.com/SeasideExamples.html but includes many deprecated techniques, and should not be relied on.

Other resources

Nice movie illustrating some of the power of Seaside at:
Click on seaside4.mov to download/view

In the book Beyond Java by Bruce A. Tate (O'Reilly /September 2005) Seaside is described as an example of a continuation server.
Secrets of lightweight development success, Part 8: Seaside (http://www-128.ibm.com/developerworks/java/library/os-lightweight8/index.html)

Appointment application (image to download, blog entry 11-Nov-2005) http://diegogomezdeck.blogspot.com/


When you install Seaside you are asked for an administrator user acount name and password.
to access an application which lists the preinstalled applications and allows you to add your own.

Seaside hosting


Seaside application configuration

The screen shot shows the configuration panel with the example applications included in the Seaside release.
Uploaded Image: seaside-2.5-configuration-app-screenshot.PNG

See Also: