Google’s Closure compiler, for optimizing and transpling JavaScript, no longer needs Java to run. Instead, Java source code is compiled to JavaScript so it can run under Node.js or in a browser.

The library, called Closure, includes an extraordinarily diverse assortment of capabilities with functionality ranging from JSON serialization to standard user interface widgets.

The Google Code blog announced the launch of a compiler, library, inspector and templates for sites to use to improve their javascript usage. The tools were “all started as 20% projects and hundreds ...