It is a popular programming language and runs in any web browser, and helps in-app performance.
It is mainly used for any client-side development for web applications. Usually for refreshing the page in a specific interval, dynamic changes in the web app, and attribute validation.
Development companies commonly use it for performing or accessing any non-blocking operation of OS. It is usually used to execute and create a shell script or access the hardware-specific information or run any operation in the backend.
It runs in the V8 engine and is many used for the apps that run on google chrome.
NodeJS is used for running and accessing the operating system for the non-blocking I/O. It is used for getting any specific information related to the hardware on one call or installed details for the certification in the specific system or various defined tasks.
Node, on the other hand, gives utility to run on a fewer operating system. Further, nodeJS is quite popular to build specific binding using the file system. It also allows the web app developers to read or sometimes to write on the disk.