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    Introduction To AJAX

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    some1_waitin_4_u5186
    AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, without reloading the entire page. It uses a combination of JavaScript, HTML and CSS to retrieve data from the server, update parts of the page, and trigger events. This allows for faster and more interactive web applications. Some key benefits of AJAX include more responsive interfaces, reduced bandwidth usage, and avoiding full page refreshes. However, it also increases the number of requests to servers and requires JavaScript support.

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    Attribution Non-Commercial (BY-NC)
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    Introduction To AJAX

    Uploaded by

    some1_waitin_4_u5186
    26 views16 pages
    AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, without reloading the entire page. It uses a combination of JavaScript, HTML and CSS to retrieve data from the server, update parts of the page, and trigger events. This allows for faster and more interactive web applications. Some key benefits of AJAX include more responsive interfaces, reduced bandwidth usage, and avoiding full page refreshes. However, it also increases the number of requests to servers and requires JavaScript support.

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    Introduction to AJAX

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    AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, without reloading the entire page. It uses a combination of JavaScript, HTML and CSS to retrieve data from the server, update parts of the page, and trigger events. This allows for faster and more interactive web applications. Some key benefits of AJAX include more responsive interfaces, reduced bandwidth usage, and avoiding full page refreshes. However, it also increases the number of requests to servers and requires JavaScript support.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    26 views16 pages

    Introduction To AJAX

    Uploaded by

    some1_waitin_4_u5186
    AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes, without reloading the entire page. It uses a combination of JavaScript, HTML and CSS to retrieve data from the server, update parts of the page, and trigger events. This allows for faster and more interactive web applications. Some key benefits of AJAX include more responsive interfaces, reduced bandwidth usage, and avoiding full page refreshes. However, it also increases the number of requests to servers and requires JavaScript support.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 16

    Introduction To

    “AJAX”

    Submitted by:
    DEEPAK VASHISHTH
    2206033
    What Is AJAX??
    • AJAX stands for Asynchronous JavaScript And
    XML.
    • AJAX is a type of programming made popular in
    2005 by Google (with Google Suggest).
    • With AJAX you can create better, faster, and more
    user-friendly web applications.
    • AJAX is based on JavaScript and HTTP requests.

     
    AJAX is based on the following
    web standards:
    • JavaScript
    • XML
    • HTML
    • CSS
    AJAX Uses HTTP Requests
    • In traditional JavaScript coding, if you want to get
    any information from a database or a file on the
    server, or send user information to a server, you
    will have to make an HTML form and GET or
    POST data to the server. The user will have to
    click the "Submit" button to send/get the
    information, wait for the server to respond, then a
    new page will load with the results.
    • Because the server returns a new page each
    time the user submits input, traditional web
    applications can run slowly and tend to be
    less user-friendly.
    • With AJAX, your JavaScript communicates
    directly with the server, through the
    JavaScript XMLHttpRequest object
    • With an HTTP request, a web page can
    make a request to, and get a response from
    a web server - without reloading the page.
    The user will stay on the same page, and he
    or she will not notice that scripts request
    pages, or send data to a server in the
    background.
    AJAX is About Better Internet
    Applications

    However, Internet applications are not always


    as "rich" and user-friendly as traditional
    desktop applications.
    With AJAX, Internet applications can be
    made richer and more user-friendly.
    WHY USE AJAX?
    • Mainly AJAX is used to build a fast, dynamic
    website, and also to save resources.
    • Ajax allows performing processing on client
    computer (in JavaScript) with data taken from the
    server.
    • For example, fields of forms, choices of user, may
    be processed and the result displayed immediately
    into the same page.
    HOW AJAX WORKS?
    • Ajax uses a programming model with display and
    events. These events are user actions.
    • To get data on the server, the object
    XMLHttpRequest provides two methods: open(to
    create a connection) & send ( to send a request to
    the server).
    • Take note that a new XMLHttpRequest
    object has to be created for each new file to
    load.
    Its Used in Purposes such as:
    • Forms
    • Rapid Interaction
    • Avoiding Refreshing
    • Auto Complete
    ADVANTAGES:
    • Less Bandwidth utilization
    • Ample User interface
    • More efficient
    DRAWBACKS:
    • Increases the number of user-generated
    requests to web servers and their back-ends
    • If JavaScript is not activated, Ajax can't
    works.
    • Any user whose browser does not support
    Ajax or JavaScript, or simply has JavaScript
    disabled, will not be able to use its
    functionality
    • Since data to display are loaded
    dynamically, they are not part of the page,
    and the keywords inside are not viewed by
    search engines.
    CONCLUSIONS
    • Ajax provides functionality to create a
    robust web application. Ajax also allows
    websites to reduce their overall bandwidth
    usage and server load by reducing the
    amount of full page loads.
    • AJAX applications are browser-
    independent and platform-independent.
    THANK YOU

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