Version 3.1 of the ArcGIS API for JavaScript is now available! Please refer to the What’s New in 3.1 document for the full list of features and bug fixes. Highlights include:
Attribution Widget
Attribution Widget added to the API to show information about the data sources used to build the map services displayed in the map. The screen shot below show the default version of the widget (the widget expands/collapses with a single click):

The widget automatically updates based on layer visibility and map extent and attribution information comes from a layer’s custom attribution data or a map service’s copyright text. The Attribution Widget is automatically included when using the full build of the API. When using the compact build, it must be manually included. See the Attribution Widget API reference for more information, including the CSS classes used to change the look of the widget.
VSDoc for Code Completion in various IDEs
VSDoc for the ArcGIS API for JavaScript that provides intellisense in Visual Studio (2010 and 2012) and in Aptana 3 for classes in the ArcGIS API for JavaScript. Refer to the download page for more information.
Visual Studio:

Aptana:

The latest version of the ArcGIS API for JavaScript includes changes to existing classes and bug fixes. Please refer to the What’s New in 3.1 document for the full list of updates and fixes.

I tried the code completion script in Aptana 3. It works ok within a stand-alone javascript file but not with inline javascript in an HTML file.
@maho we noticed this as well and noticed this is how other code assist plug-ins work in Aptana. We decided it was acceptable, plus it encourages you to move your JS code to separate files.
Sounds ok to me. I just noticed the difference as I had an Aptana 2 on another machine, where code completion worked in the HTML file.
Where can I find the download for the API? We use the off-line version as our FW does not allow users to access the internet.
This was usually found on http://resources.arcgis.com/content/web/arcgis-javascript-api-download, but I can only find up to version 2.8.
Everything is available in this page : http://www.esri.com/apps/products/download/index.cfm?fuseaction=download.all
Thanks, this is a good link to save….
Cheers!
It doesn’t seem to work for me either in html file or in js file. Am I missing something? Basically I just downloaded the zip file and copy the js file into the project.
Read this: http://forums.arcgis.com/threads/65685-Copy-and-paste-of-code-not-working-in-notepad
Please use a local web server to run the JS API samples.
Pls add “Aptana” tag…
http://blogs.esri.com/esri/supportcenter/tag/aptana/