This is an example of hacking Angular v1.x to lazy load code that a bunch of people have asked me for.
Simply include lazyLoad.js, use angular.lazyLoad in route resolve and it will magically work.
The main.js is loaded at the beginning. Later, when navigating to /list route, additional module lazy-list.js is loaded. It should be fairly simple to make this work with RequireJS.
In Angular v2, integration with a module loader (such as RequireJS) and lazy loading will be simple.