Friday, 1 June 2018

Chaudhari Karan

JavaScript Introduction

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JavaScript Introduction

Hello friends, In this lecture, we will discuss the introduction of JavaScript.
JavaScript Introduction


JavaScript language is the dynamic, interpreted with an object-oriented programming language. It is commonly used in web pages.  It is designed client-side page for interact and make it dynamic pages.
First JavaScript was known as LiveScript, but Netscape changed the name to JavaScript because of the excitement generated by Java. JavaScript first appearance in Netscape 2.0 in 1995 with the name LiveScript.  

Specification of JavaScript language.

  •  JavaScript is the dynamic, interpreted programming language.
  •  JavaScript used for designed network-centric applications.
  •  JavaScript complementary and integrated with Java and HTML.
  •  It is Open and cross-platform.

Client-Side JavaScript


JavaScript language is the most common form of the client-side. It is included in or referenced by an HTML document for the code to be interpreted by the browser.

It means a web page doesn't need a static HTML, but it can include programs interact with a user, control the browser, and dynamically create HTML content.

The JavaScript language is client-side mechanism provides. It has many advantages over traditional CGI server-side scripts.
The JavaScript code is executed when entering the user valid information, it would be submitted to the Web Server.
JavaScript used to trap user-initiated events like button clicks, link navigation, and other actions, that is the user initiates explicitly or implicitly.
Advantages of JavaScript
  • Less server interaction: Validate user input sending before the page off to the server. It saves server traffic, it means less load on the server.
  • Immediate feedback to the visitors: User doesn't have to wait for the reload page.
  • Increased interactivity: Create interfaces for reacting the user hovers over with mouse or activates them via the keyboard.
  • Richer interfaces: JavaScript is included such items as drag-and-drop components and sliders to Rich Interface to your site visitors.

Limitations of JavaScript

  • Client-side JavaScript doesn't allow the reading or writing of files. It has kept for security.
  • JavaScript not used for networking applications because there is no support available.
  • JavaScript doesn't have multithreading or multiprocessor capabilities. 


JavaScript Development Tools


One of the most major strengths of JavaScript is it does not require any expensive development tools. It can start with the simple text editor such as Notepad or Notepad++. It is an interpreted language inside the context of a web browser. JavaScript doesn't need a compiler.
Here are some vendors JavaScript editing tools:
  • Microsoft FrontPage: It is a popular HTML editor called FrontPage. It also provides web developers with a number of JavaScript tools.
  • Macromedia Dreamweaver MX: It is a very popular HTML and JavaScript editor. It is the professional web development crowd. The tool provides some handy prebuilt JavaScript components, integrates well with databases, and conforms to new standards like XHTML and XML.
  • Macromedia HomeSite 5: It is a most-liked HTML and JavaScript editor. It is developed by Macromedia can be used to manage personal websites effectively.   


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31 July 2018 at 00:30 delete

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