Do script loaders replace the need to do script combining?
Or are they really complementary tools?
JavaScript loaders only defer JavaScript loading and provide lazy load or on-demand load experience for us. But they don't reduce HTTP requests. Thus, it totally depends. If you load 200KB of JavaScript as a combined file at first and only use 10KB, then you'd better separate JavaScript codes into their original files and use a loader to defer loading process to increase your performance.