12. Plug-Ins
The entire jQuery framework consists of the jQuery core and the jQuery UI. Essentially, however, the framework can be expanded as much as you like. The expansions are referred to as plug-ins. They are pure JavaScript and Cascading Style Sheets (CSS) libraries, but they have to conform to certain predefined rules. By now, there is a huge number of these plug-ins, which are often available for free (and sometimes commercial) use via the jQuery website. Basically, any jQuery developer can publish plug-ins there. And you, as a website designer or user of the jQuery framework, can use these plug-ins if they offer a functionality that you do not want to create yourself and that the native framework does not offer. In this chapter, we take ...
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