Just as CSS separates the visualization of the structure of HTML , JQuery separates the behavior of the structure of HTML . For example, instead of direct reference to the event handler pressed, control is transferred to JQuery, identifying the button and then convert it into a click event handler. This separation of behavior and structure is also called the principle of unobtrusive JavaScript.
JQuery library contains a functional, useful for the widest possible range of tasks. Nevertheless, the developers of the library does not attempt to reconcile in jQuery functions that would come around, because it would lead to a large code, most of which are not in demand. It was therefore implemented the architecture of a compact universal core libraries and plug-ins. This allows you to collect for a resource that is JavaScript-functional that it would be in demand.
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