Javascript Introduction

Javascript Introduction

Why Javascript needed ?

JavaScript is one of the 3 languages all web developers must learn:

1. HTML to define the content of web pages.                       
2. CSS to specify the layout of web pages
3. JavaScript to program the behavior of web pages.

What is Javascript ?

1. &nbsp; JavaScript is the&nbsp;<b>Programming Language</b>&nbsp;for the Web.
2. &nbsp; JavaScript can update and change both&nbsp;<b>HTML</b>&nbsp;and&nbsp;<b>CSS.</b>
3. &nbsp; JavaScript can&nbsp;<b>calculate</b>,&nbsp;<b>manipulate</b>&nbsp;and&nbsp;<b>validate</b>&nbsp;data.&nbsp;

Few years ago, Javascript was used as only client side programming language to handle task on client side for web pages. Now-a-days , JavaScript also used in backend programming (Example : NodeJS).