Ajax Postback Control

The Users Without Passwords Project allows multiple authenticators. The user enters a name for the authenticator when it is created. I allow the user to edit the name with Ajax from a page which displays all authenticators for the user. I developed _FieldUpdatePartial. cshtml with postback JavaScript and embedded images. You can edit, cancel or update the name. If you update, the control implements a waiting state. The new value and entity id are posted to a handler which updates the database. The handler returns a status, and an error or the new value and entity id if successful. If the status is Failed, the error is displayed with the message-modal. If the status is Success, a function updates the control with the matching entity id. The control is initialized with the FieldUpdateInputModel.cs which provides the entity id, existing value, postback url, postback handler and a failure redirect url. The postback has a 2 second delay, long for database functions but I wanted to demonstrate the waiting state.