What's the best JavaScript deployment strategy you've seen? I.e., are assets always compiled and bundled? How do you split up your bundles? Would you use names

What's the best JavaScript deployment strategy you've seen? I.e., are assets always compiled and bundled? How do you split up your bundles? Would you use namespaces, like Closure? How do you handle dependencies? What percent of the code lives on the page in script tags versus external resources? What testing framework(s) do you use? Do you prefer a certain code style?