In one embodiment, a method includes receiving, at a server from a client, a first request for a dialog and particular parameters associated with the first request; invoking a method of a class in a server-side library comprising server-side code, wherein the method corresponds to a dialog type of the requested dialog; generating, based on the invoked method, a first dialog code configured to implement functionalities supported by the requested dialog; sending, to the client, the first dialog code for execution to cause the dialog to be displayed; receiving a second request sent from the client in response to a specific user interaction with a component of the displayed dialog, wherein the second request is a modified version of the first request that comprises additional parameters corresponding to the specific user interaction; and sending, to the client, a second dialog code based on the additional parameters.