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

var value; // Type: Vintasoft.Twain.WebTwainImageCompressionEnumJS[]
value = instance.getSupportedImageCompressions();

function getSupportedImageCompressions() : WebTwainImageCompressionEnumJS[];

Return Value

This function sends a synchronous request to get supported values of WebDeviceCapabilityIdEnumJS.ICompression capability. If you want to use asynchronous request instead of synchronous request, please get information about WebDeviceCapabilityIdEnumJS.ICompression capability using WebTwainDeviceJS.getCapabilityAsync function.

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members