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

var value; // Type: Vintasoft.Twain.WebTwainPageSizeEnumJS
value = instance.get_PageSize();

function get_PageSize() : WebTwainPageSizeEnumJS;

Return Value

This property sends a synchronous request to get value of WebTwainDeviceCapabilityIdEnumJS.ISupportedSizes capability. If you want to use asynchronous request instead of synchronous request, please get information about WebTwainDeviceCapabilityIdEnumJS.ISupportedSizes capability using WebTwainDeviceJS.getCapabilityAsync or WebTwainDeviceJS.getCapabilitiesAsync function.

Reference

WebTwainDeviceJS Class
WebTwainDeviceJS Members