There are numerous open-source libraries for Node.js, in which most of them are hosted on the npm website. The Node.js developer has IRC channel #node.js and two main mailing lists on freenode. The open-source community has produced web application frameworks to increase the speed of application development. The integrated development environment (IDE) of latest desktop allows editing and debugging features particularly for Node.js applications. The IDE also includes Brackets, Atom, MS Visual Studio and Visual Studio Code. Few online based IDE’s also support Node.js, like Codency, Cloud9 IDE, Koding and the Node-RED visual flow editor.
Node.js implements libuv under hood to manage non-sync events. It is an abstraction layer for file system and network operating functionally on Linux, macOS, Windows and Unix.
Node.js works on a single-thread event loop, with non-blocking I/O calls that allow it to support numerous numbers of connections without meeting the cost thread of context switching. The idea of single thread is being implemented among all other requests because of its observer pattern method. This is used for building highly concurrent applications. A thread pool manages to execute parallel tasks in Node.js. The registered call-back is triggered only when a thread in the thread pool finishes a task and informs the main thread regarding that. A dis-advantage of this approach is that Node.js blocks vertical scaling. The default numbers of thread are increased to meet this difficulty.