Creating Nodemon in Node.js

Nodemon is a tool designed to automatically restart applications whenever changes are detected in the codebase, thus eliminating the need for manual restarts and allowing developers to focus on coding. It utilizes the FileSystemWatcher API to monitor file system changes, although this can sometimes lead to multiple notifications due to operating system behaviors. To address this, the Chokidar package is used to enhance file system watching capabilities. The article also explores the use of RxJS for managing event-based architecture through observables and reactive programming, which simplifies handling asynchronous events and helps avoid callback hell. By combining these tools, the process of creating a command-line utility that watches directories and extensions, ignores specific paths, and executes scripts upon detecting changes becomes more efficient. The implementation involves parsing command-line arguments, setting up file watchers, and managing script executions using Node.js's child_process module, with the added benefit of customizing console messages for clarity.