In Node 6, there are two primary tools for debugging with Node.js: the debug module and the debugger utility. The debug module is invoked using an environment parameter to define namespaces for logging debug messages from modules. It also can be imported into an application to implement your own custom namespace for debug logs. This feature is still fully available in Node 8 and later versions and is highly useful when tracking down issues in your application's behavior.
The built-in debugger utility is an interactive debugger in Node.js that, while not very sophisticated or full-featured, is an easily accessible and useful tool that many other more sophisticated debugging tools leverage as a foundation. It provides a basic, command-line driven debug tool that can be very handy when you don't want to rely on any other third-party...
