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Though optional, you could have the total control of the client's functionality without the assistance of server-side coding. Generally, you don't need to do it. You don't even need to know how ZK Client Engine and client-side widgets communicate with the server. Their states can be synchronized automatically with ZK. However, you can still control this type of synchronization if you want. It is the so-called Server-client fusion.

A good rule of thumb is that you should handle events and manipulate UI mostly, if not all, on the server, since it is more productive. Then, you could improve the responsiveness and visual effects, and/or reduce server loading by handling them at the client, when it is appropriate. Notice that JavaScript is readable by any user, so be careful not to expose sensitive data or business logic when migrating some code from server to client.

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Last Update : 2011/7/22


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