Modern JavaScript Tutorial: simple, but detailed explanations with examples and tasks, including: closures, document and events, object oriented programming and more.
This site contains code repositories with documentation, and lots of resources. Logging, textFinder, blockingQueue, threadPool, comm, fileSystem, errorHandling, modelling and design patterns.
Unlike most introductions to JavaScript, these lessons present an even mix of browser programming and server programming. We give each topic only shallow coverage; if you want to know more, there are many other free tutorials you can dive into once you’ve mastered the basics, some of which are both up-to-date and well designed.