What is JavaScript?

A scripting language that get merged into HTML to create dynamic contents at the client side using other related technologies of Dynamic HTML known as Document Object Model (DOM), Events, JSON, AJAX etc.

HTML provides <script></script> tag to merge the JavaScript code into HTML.

It is developed by Netscape and it is based on Java.

JavaScript can also be used at the server side using Node.js to build the dynamic websites.

There many technologies build based on JavaScript like React.js, Angular.js, Vue.js etc.