Importance of Javascript

There are 3 standard web technologies used to make any web page. 

  • HTML ( use to structure and add things to your web page )
  • CSS ( use to style your web page like font-size, font-color )
  • Javascript ( use to update your web page dynamically )




  • Javascript is a programming language which used to load or display the dynamic content easily to your web page. 
  • This is the only language which you can use as a front-end and back-end language to create your web page, if you are using any other language for your back-end, still you have to use javascript as your front-end to make it properly.   
  • You can use it with other frameworks also. Like you can use it with COCOS JS ( gaming engine ) to make web games.
  • It can be used for lots of validations also.

Some famous Frameworks depends upon Javascript

  • jQuery

jQuery is a JS library which is used to manipulate the structure of HTML DOM, also used for animation, event handling etc.

  • Node.js

It is used as server-side scripting which uses JS to write command line tools.

  • Angular.js

It is a front-end web framework mainly maintained by Google and a community of individuals to address many of the challenges encountered in developing single-page apps.

  • React.js

It is a JS library which is used for building User Interface components. It is maintained by Facebook and a community of individuals. Major use of React is that it can make a single-page app just by using components.



Big companies which use Javascript

  • PayPal ( shifted its entire back-end to Javascript from Java) 
  • Facebook ( built its mobile app using React.js )
  • Netflix
  • Google
  • Microsoft
  • Walmart