var instance = new Vintasoft.Twain.WebTwainDeviceJS(deviceName, productFamily, manufacturer, driverVersion, twainVersion, deviceManager, is64Bit);

var value; // Type: any

// Parameters
var usageMode; // Type: number
var successFunc; // Type: function
var errorFunc; // Type: function

value = instance.getSupportedCapabilitiesAsync(usageMode, successFunc, errorFunc);

function getSupportedCapabilitiesAsync(
   usageMode
An integer value, which defines usage mode of TWAIN device capability.
 : number, 
   successFunc
A function that will be executed if request is executed successfully.
 Function prototype: "successFunc(twainDevice, capInfos)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'capInfos' parameter is an array that contains information about TWAIN device capabilities.
 : Function, 
   errorFunc
A function that will be executed if request is failed.
 Function prototype: "errorFunc(twainDevice, errorMessage)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'errorMessage' parameter is string that describes error.
 : Function
) : any;

Parameters

usageMode

An integer value, which defines usage mode of TWAIN device capability.

successFunc

A function that will be executed if request is executed successfully.
Function prototype: "successFunc(twainDevice, capInfos)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'capInfos' parameter is an array that contains information about TWAIN device capabilities.

errorFunc

A function that will be executed if request is failed.
Function prototype: "errorFunc(twainDevice, errorMessage)", where 'twainDevice' parameter is an instance of WebTwainDeviceJS class, 'errorMessage' parameter is string that describes error.

This function sends an asynchronous request to get information about all capabilities supported by TWAIN device. If you want to use synchronous request instead of asynchronous request, please use WebTwainDeviceJS.getSupportedCapabilities function.

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members