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.
API Call Syntax in the AJAX Toolkit
SOAP API calls use slightly different syntax in AJAX Toolkit, depending on whether the call is synchronous or asynchronous.
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