What is ajax in salesforce


AJAX is the art of exchanging data between server and client without reloading the complete web page. Visualforce has inbuilt support for the AJAX. using the attribute “rerender” we can specify that where the response should be rendered.Oct 17, 2011


What is Ajax in Visualforce?

Using Ajax in a Page Some Visualforce components are Ajax aware and allow you to add Ajax behaviors to a page without having to write any JavaScript. The following topics provide examples:

What is the use of Ajax?

AJAX is a developer’s dream, because you can: 1 Read data from a web server – after a web page has loaded 2 Update a web page without reloading the page 3 Send data to a web server – in the background

What is the difference between APEX API and AJAX toolkit?

This toolkit supports all SOAP API calls, as well as runTests () from Apex. All header options in the SOAP API are supported in the toolkit, but they are specified differently than in the API. The AJAX Toolkit provides the ability to handle errors for synchronous and asynchronous calls.

What browsers does the AJAX toolkit support?

The AJAX Toolkit supports Microsoft® Internet Explorer® versions 9, 10, and 11 with the latest Microsoft hot fixes applied, and Mozilla® Firefox®, most recent stable version. The AJAX Toolkit is based on the partner WSDL. Because there is no type checking in JavaScript, the type information available in the enterprise WSDL is not needed.


What is AJAX call in Salesforce?

A component that adds AJAX support to another component, allowing the component to be refreshed asynchronously by the server when a particular event occurs, such as a button click or mouseover. apex:actionStatus.

What is AJAX explain with example?

AJAX = Asynchronous JavaScript and XML. AJAX is a technique for creating fast and dynamic web pages. AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.

What is action function Salesforce?

Action Function is used in the Visualforce page to call the Service Side method using JavaScript and does not add the Ajax Request before calling the Controller method.

What is action support in Salesforce?

actionSupport component adds AJAX support to other components in visualforce. It allows components to be refreshed asynchronously by calling the controller’s method when any event occurs (like click on button). It allows us to do partial page refresh asynchronously without refreshing full page.


The XMLHttpRequest API is the core of Ajax. This article will explain how to use some Ajax techniques, like: Analyzing and manipulating the response of the server. Monitoring the progress of a request.

Is AJAX front end or backend?

Ajax is not a technology. It is terminology given to the act using JavaScript embedded in a webpage (client-side code) to make an HTTP request (to a backend) and processing the response without leaving the page.

What is oops concept in salesforce?

Object means a real world / run time entity such as marker, car, table, chair etc. Object-Oriented Programming is a methodology or way to design a program using classes and objects. It eases the software development and its maintenance by providing some beautiful concepts as followed. Classes.

What is Apex facet?

A placeholder for content that’s rendered in a specific part of the parent component, such as the header or footer of an . Use this component to get user input for a controller method that does not correspond to a field on an sObject.

What is Apex Param?

tag is used to pass values from JavaScript to an Apex controller,it can only be used with the folloing parent tags.

What is difference between action support and action function?

Action function can call the controller method from java script. 2. Action support adds AJAX support to another visualforce component and then call the controller method. Here action support adds AJAX to output panel, so once you click on output panel controller method will be called.

What is ReRender in Salesforce?

ReRender is used to refresh a particular section of the visual force page. We have to just mention the id of the page section (in the ReRender attribute) that needs to be refreshed. In the following example Clicking of the command button “Refresh Lower Page Block” refreshes the lower page block.

What is transient variable in Salesforce?

The value of transient variable is only transferred from controller to visualforce page but not as part of view state. As the value is not part of view state, the changed value of that variable is not transferred back from visualforce page to controller when a new request is made by clicking a button or link.

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What is AJAX in web development?

AJAX is a developer’s dream, because you can: Read data from a web server – after a web page has loaded. Update a web page without reloading the page. Send data to a web server – in the background.

How does AJAX work?

AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.

Is AJAX a programming language?

AJAX is not a programming language. AJAX just uses a combination of: A browser built-in XMLHttpRequest object (to request data from a web server) JavaScript and HTML DOM (to display or use the data) AJAX is a misleading name. AJAX applications might use XML to transport data, but it is equally common to transport data as plain text or JSON text.


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