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The Event Model consists of the two sections on event propagation and event listener registration and the Event interface.A DOM application may use the interface with parameter values "Events" and "2.0" (respectively) to determine whether or not the event module is supported by the implementation.
Please, refer to additional information about Event flow is the process through which the an event originates from the DOM implementation and is passed into the Document Object Model.The methods of event capture and event bubbling, along with various event listener registration techniques, allow the event to then be handled in a number of ways. If neither event capture or event bubbling are in use for that particular event, the event flow process will complete after all listeners have been triggered.If event capture or event bubbling is in use, the event flow will be modified as described in the sections below.Any exceptions thrown inside an s from the top of the tree to the event's target is determined before the initial dispatch of the event.The DOM Level 2 Event Model is designed with two main goals.The first goal is the design of a generic event system which allows registration of event handlers, describes event flow through a tree structure, and provides basic contextual information for each event.
Additionally, the specification will provide standard modules of events for user interface control and document mutation notifications, including defined contextual information for each of these event modules.
The second goal of the event model is to provide a common subset of the current event systems used in browsers.
This is intended to foster interoperability of existing scripts and content.
It is not expected that this goal will be met with full backwards compatibility.
However, the specification attempts to achieve this when possible.
The following sections of the Event Model specification define both the specification for the DOM Event Model and a number of conformant event modules designed for use within the model.