JavaScript : Introduction

JavaScript :

  • JavaScript is used to create client-side dynamic pages.
  • JavaScript (js) is a light-weight object-oriented programming language.
  • JavaScript is not a compiled language, but it is a translated language.
  • The JavaScript Translator (embedded in the browser) is responsible for translating the JavaScript code for the web browser.
  •  JavaScript, users can build modern web applications to interact directly without reloading the page every time.
  • databases such as CouchDB and MongoDB uses JavaScript as their scripting and query language.

Features of JavaScript :

There are following features of js :-

  • Object-Centered Script Language
  • Light Weight and delicate
  • Interpreted language
  • Case Sensitive format/language
  • Ability to perform In Built Function
  • Statements Looping
  • Client edge Technology
  • Validation of User’s Input
  • Else and If Statement
  • It uses prototypes rather than using classes for inheritance.
  • It is supportable in several operating systems including, Windows, macOS, etc.
  • It provides good control to the users over the web browsers.

Application of JavaScript

JavaScript is used to create interactive websites. It is mainly used for:

  • Client-side validation
  • Manipulating HTML Pages
  • User Notifications
  • Dynamic drop-down menus
  • Displaying date and time
  • Displaying pop-up windows 
  • Alert dialog box
  • Confirm dialog box
  • Prompt dialog box
  • Back-end Data Loading
  • Presentations
  • Server Applications
  • Displaying clocks etc.

JavaScript Example :

Output :-

Welcome to JavaScript

Hello JavaScript by JavaScript

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