AJAX Toolkit Developer Guide

AJAX Toolkit Developer Guide
When to Use the AJAX Toolkit
Working with the AJAX Toolkit
API Calls and the AJAX Toolkit
Synchronous and Asynchronous Calls with the AJAX Toolkit
API Call Syntax in the AJAX Toolkit
Object Functions
Data Types in AJAX Toolkit
source Context Variable
Debugging with the AJAX Toolkit
Example Calls Using the Ajax Toolkit
SOAP (AJAX) API End-of-Life Policy
SOAP Header Options with the AJAX Toolkit
Error Handling with the AJAX Toolkit
Advanced Topics
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Note: This release is in preview. Features described here don’t become generally available until the latest general availability date that Salesforce announces for this release. Before then, and where features are noted as beta, pilot, or developer preview, we can’t guarantee general availability within any particular time frame or at all. Make your purchase decisions only on the basis of generally available products and features.

Synchronous and Asynchronous Calls with the AJAX Toolkit

The AJAX Toolkit supports both synchronous and asynchronous calls.

Asynchronous calls allow the client side process to continue while waiting for a call back from the server. To issue an asynchronous call, you must include an additional parameter with the API call, referred to as a callback function. Once the result is ready, the server invokes the callback method with the result.