The book is divided into 11 chapters in total. First, it gives an overall introduction to jquery in the form of examples to help readers establish an overall view of jquery, which is especially important for beginners. Secondly, it explains in detail the various selectors and jquery features of jquery. Methods of operating dom, events and applications in jquery, animations and special effects in jquery, the application of ajax in jquery, and the usage methods and techniques of various commonly used jquery plug-ins. All these knowledge points are equipped with complete examples ( Including three parts: demand analysis, code implementation and result display); then the extended knowledge of jquery ui and jquery utility functions, as well as important knowledge of jquery development skills and performance optimization are elaborated; finally, two A representative comprehensive case concludes the book, hoping to help readers put the previously learned theoretical knowledge into practice and quickly enter the palace of jquery.