Java script

Outline
 History of JavaScript?
 Introduction To JavaScript?
 Where dose JavaScript Fit In?
 What Can JavaScript Do?
 Advantages Of JavaScript?
 JavaScript Development Tools?
 Limitations Of JavaScript?
 Conclusion…

History Of JavaScript
 JavaScript was introduced by ‘Brendan Eich’ in 1995.
 JavaScript was developed by Netscape communication
corporation.
 JavaScript become an ECMA standard in 1995.
 JavaScript has been adopted by all major graphical web
browser.

Introduction To JavaScript
 JavaScript is a dynamic computer programming
language.
 It is a lightweight and most commonly used as a part of
webpage.
 Web pages implements allow client-side to interact
with the user and make dynamic pages.
 JavaScript is an interpreted programming with oop
capability.
 JS is a open and cross platform and designed for
creating network and centric application.

 Client-side JS is the most common form of the
language.
 The script should be included in or referenced by an
HTML document for the code to be interpreted by
browser.
 JS client-side mechanism provides many advantages
over traditional CGI server-side script.

Where Does JavaScript Fit In?
 Recall:-
 Client opens connection to server.
 Client sends request to server.
 Server sends response to client.
 Client and server close connection.
 Client display the response received from server and
display in HTML.
 Between the body tag of HTML.
 Between the head tag of HTML.
 In .js file(external JavaScript).

What Can JavaScript Do?
 JavaScript dynamically modify an HTML page.
 JavaScript can react to user input.
 JavaScript can validate user input.
 JavaScript can be used to create cookies.
 JavaScript users interaction does not require any
communication with the server.

Advantages of JavaScript?
 The merits of JS are:- Less user interaction:
 You can validate user input before sending the page off to
the server. this saves servers traffic.
 Immediate feedback to the visitors:
 They don’t have to wait for a page reload to see if they have
forgotten to enter something.
 Increased Interactivity:
 You can create interfaces that react when the user hovers
over them with a mouse or activates them via keyboard.
 Richer interface:
 You can use JS to include such items as drag and drop
components and sliders to give a rich interface to your site
visitors.

JavaScript Development Tools?
 Microsoft FrontPage: Microsoft developed a popular
HTML editor called FrontPage. FrontPage also
provides web developer with a number of JS tools to
assist in the creation of interactive website.
 Macromedia Dream Weaver MX: It a very popular
HTML and JS editor in the professional web
development crowd. It provides several handy prebuilt
JS components, integrates well with database, and
conform to new standers such as XHTML and XML.
 Macromedia Home site 5: It is a well-liked HTML and
JS editor from Macromedia that can be used manage
personal website effectively.

Limitations Of JavaScript?
 Demerits of JS: We can treat that JS is a full fledged
programming language.
 Client-side JS doesn't allow the reading or writing of
files.
 This has been kept for security reasons.
 JS cannot be used for networking applications because
there is no such support available.
 JS doesn’t have any multi threading or multi processer
capabilities once again ,JS is a light weight interpreted
programming language. That allows you to build
interactivity into otherwise static HTML pages.

Conclusion!
 JavaScript is a dynamic programming language it will
gives less server interaction and increased
interactivity richer interface to the user. By using of
JavaScript development tools user can create
interactive feel good web pages.

Java script

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