Download Prototype

Download the latest stable version—1.6.0.3 (September 29, 2008)

Learn about what’s new in version 1.6.

Prototype development

You can browse the source code at our GitHub repository.

If you want the full development package (including unit tests), you can use Git to clone the source code:

git clone git://github.com/sstephenson/prototype.git

Build the complete “prototype.js” file with rake dist command—find more details about this in the contribution guide.

Compatibility

The latest version of Prototype is compatible with the following browsers:

Browser Version(s)
Mozilla Firefox ≥ 1.5
Microsoft Internet Explorer ≥ 6.0
Apple Safari ≥ 2.0
Opera ≥ 9.25

Archives

1.6

1.5