Like other programming languages, Node.js also uses packages and modules in application development. These are the directories that consist of a variety of functions that are imported from npm (node package manager) into the program code and utilized in the projects.
There are some special features of Node.js that are popular in making great web applications,
SPECIAL FEATURES OF NODE.JS(UPDATED)
There are two types of modules in Node.js.
Core Modules – These are the modules that are pre-compiled with the Node.js library. The main purpose of these core modules is to enable developers to code easily without repeating code sections.
User-Defined Modules – In user-defined modules, the developer makes for a specific purpose in its application. Modules are extracted through the require function The argument possesses the same name of that module in the core module.
Async Hooks is a feature shipped with new Node.js updates. This feature of Node.js gigs and pulls out a huge amount of analytical data about the process. The async_hooks module gives an API to register its callbacks tracking the lifetime of asynchronous resources created inside a Node.js application.
There is a lot of things to be done with async hooks as a powerful tool to build around the Node.js process. It makes it easier to trace resources easily.
NODE PACKAGE MANAGER(NPM)
The NPM (Node Package Manager) comprises a huge number of modules (i.e. 50000+ modules) with considerable growth. The one thing that should not be ignored in Node.js, it comes with default node package manager tool and built-in support for package management on installation. The idea of NPM modules comes with reusable components that available easy installation through an online repository, with different versions and dependency management.
This utility tool was recently brought into the Node.js core. It helps to find abnormal terminations, unexpected errors, high CPU usage, and more. In recent updates, Node.js comes with a bunch of diagnostic utilities like Node-report to help in encountering errors and difficulties to pinpoint.
SINGLE THREADED(STILL HIGHLY SCALABLE)
With the combination of Event looping, Node.js uses a single-threaded model. This particular event mechanism helps the server quickly respond in a non-blocking way. Unlike traditional servers that create limited threads to handle requests, Node.js uses non-blocking which makes the server highly scalable. Node.js uses a single-threaded program that provides service to a much larger number of requests.
Node-option is a new environment variable that comes with Node.js. It allows command-line arguments that provided via an environment variable. Since it is an environment variable, it can be specified in a project without modifying any scripts that run, and it affects all processes that been derived from the environment, particularly node’s default processes.
These special features of Node.js provide great support in building some enterprises level web applications.