Javascript Runtime Environment

javascript runtime environment

1JavaScript Runtime Enviroment provides the enviroment where we can run our JavaScript code.
2Two javascript runtime enviroments are :
I. Browser
II. Node.js

1A browser is a software application that is used to access and view information on the World Wide Web (WWW).
2It allows users to interact with web pages, view multimedia content, and surf the internet.
3The Browser acts as a JavaScript runtime environment because it includes a JavaScript engine that interprets and executes JavaScript code

1A JavaScript engine is a computer program that executes JavaScript code.
2It is a core component of web browsers, server-side JavaScript platforms, and other JavaScript-based environments.

1 V8 (fastest Js engine): developed by Google, used in Google Chrome and Node.js
2 SpiderMonkey : developed by Mozilla, used in Firefox
3 JavaScriptCore : developed by Apple, used in Safari
4 Chakra : developed by Microsoft, used in Microsoft Edge and Internet Explorer (legacy)

1The main reason of javascript popularity.
2Node.js is a software application that executes JavaScript code. It is not a framework or a library.
3It allows developers to run JavaScript code outside of a web browser, such as on a server or command-line interface.
4Node.js uses the V8 JavaScript engine, which is also used in Google Chrome.
5It is built on top of an event-driven, non-blocking I/O model, which allows it to handle large numbers of simultaneous connections without blocking the execution of other code.
6This makes it well-suited for building scalable, high-performance applications that can handle a large amount of traffic.
7Because after introduction of Nodejs, we were able to run javascript anywhere like in web servers, as command-line tools, desktop applications, and even IoT (Internet of Things) devices.