Introduction
From Documentation
ZK Client-side Reference is the reference for client-side programming, including component development.
Client-side programming is optional to application developers. However, if you'd like to have more control of the client, please refer to the General Control and Customization sections. The other sections are more for component development.
If you would like to develop a component, you should read ZK Component Development Essentials first for introduction. Then, you could reference this book if there is an issue.
ZK Client Engine is based on jQuery and you could refer to jQuery Documentation for details.