Writing Clean and Maintainable Node.js Code

The earlier chapters each taught one part of Node.js. This chapter covers the habits that keep a working application easy to change, easy to diagnose in production, and fast when the work grows. It has three lessons: writing clean code, logging and monitoring a running application, and two advanced features called streams and worker threads.

Code is easy to maintain when a developer who did not write it can find the part that needs to change, change it, and be confident that nothing else broke