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Navjot Kaur edited this page Jun 24, 2022 · 3 revisions

JavaScript Overview :

  • JavaScript is a programming language that adds interactivity to your website.
  • JavaScript ("JS" for short) is a full-fledged dynamic programming language that, when applied to an HTML document, can provide dynamic interactivity on websites.
  • It was invented by Brendan Eich, co-founder of the Mozilla project, the Mozilla Foundation, and the Mozilla Corporation.
  • JavaScript is case sensitive.
  • Most popular and widely used programming language.

Where to use the JS

  • Used in browser to build interactive webpages.
  • We can build web/mobile apps.
  • We can build real time networking apps like chats and video streaming services and command line tools or even games.

Where does JS code run ?

  • Originally designed to run only in browsers. So every browser has a JS engine that excute the JS code. Examples : Firefox : SpiderMonkey JS engine Chrome : v8
  • In 2009, engineer called Brain Doll took the open source JS engine in Chrome and embedded it inside C++ program. He called that program as Node.
  • Now JS code run on node also other than browser.

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