Looking for the next step in Node.js? Build on what you learned in the first course in our seven-part series on mastering Node.js, and take a look at modules, with expert Eric Greene.   See why modules are an important part of Node.js (hint: they facilitate code reuse). Get the details on what modules are, how they're written, and how they're imported and exported. Take a deep dive into Node.js modules and module patterns, and see demos on how to transpile ES2015 modules with Babel. Dive into this course, and explore the critical concepts that Node.js developers must know.