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 )
IMPORTANCE
- 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
- Microsoft
- Walmart