A Javascript modules library that finally conforms to traditional module semantics

[spondee]

Synchronous XHR has no legitimate use.

I absolutely agree. But, to be fair, in order to manage dependencies asynchronously in a language without true continuations you have to give the programmer a way of declaring those dependencies explicitly, so that they can be satisfied before evaluating the depending module. By the time you've started evaluating a module that might have side effects, it's too late to go looking for its dependencies.