I need to validate jqxGrid cell depending result from server. But validation message shows as ‘invalid value’ though still server not responded. How can i wait for callback from server for validation message?
You just could not return value(for example true/false) directly in a subscription, because it is an async call. An async call means it is running in the background (actually scheduled for later execution) while your code continues to execute.
You have to do all calculations with the server data in the service and then return true/false from the service.
You could review the following example whether it fits your needs.