Advantages and Disadvantages of AJAX


Asynchronous JavaScript and XML (AJAX) is a unit of web development techniques used for generating interactive web applications. Using AJAX, web applications can recover the data from the server asynchronously. As done in the settings, there would be no interference with the behaviour and the display of the current page.

AJAX is an expansion which symbolizes a broad range of web technologies which can help web applications to communicate with the server without disturbing the current status of that page. AJAX refers to the following technologies:

1. The document object model for the active display of and interfacing with data.

2. Cascading style sheets (CSS) and extensible hypertext markup language (XHTML) are used for presentation.

3. The XML HTTP requests object to communicate asynchronously.

4. For controlling and interchanging the data, extensible style sheet language transformations (XSLT) and XML are used.

5. JavaScript to bring all these technologies collectively.

Advantages of AJAX:

1. Many times, pages on a website have similar information. If those pages were implicit, a similar matter would be found on each page. AJAX permits a web application to repossess new information and alter how the matter is shown. This is very competent, diminishes the quantity of bandwidth used, and lessens load times.

2. Using a recent request permits the user’s web browser to be more collaborative and speedily react to the inputs of consumers. The consumer might even make out the application to be quicker.

3. Associations to the server are concentrated, as style sheets and scripts simply require to be downloaded one at a time.

Disadvantages of AJAX:

1. Animatedly produced web pages don’t turn up in the history engine of a browser, hence clicking on the Back button would not restore the last seen page.

2. An animatedly produced web page is complicated to bookmark.

3. In case JavaScript is disabled or if a browser doesn’t support AJAX, the functionality of AJAX can’t be utilised.

4. After AJAX, there is no standard body. Hence there is no broadly assumed best practice for testing AJAX applications.

5. Presently, printed SLA is stipulated by the provider so that the user is also pleased by the services, and the services might be reasonable, planned and estimated with the service of other providers too.