http://googlecode.blogspot.com/2009/11/introducing-closure-tools.html

JavaScript lacks a standard class library like the STL or JDK. At Google, Closure Library serves as our "standard JavaScript library" for creating large, complex web applications.

ja nie som moc javascriptovy, moze mi niekto napisat svoj nazor na tieto ich tooly, pripadne laicky popisat tie najefektivnejsie priklady pouzitia? tiez verim, ze to niekomu pomoze, tak ako nam c++karom pomaha STL..