OOUI/OOjs primer/nl

De OOUI bibliotheek is gebaseerd op het event model van. Als u niet bekend bent met OOjs, wilt u misschien even de tijd nemen om vertrouwd te raken met de, omdat het een handige en krachtige hulpmiddel is dat vaak in voorbeelden zal worden gebruikt.

EventEmitter allows event handlers to be connected to an object, called when events occur, and disconnected when no longer needed. Events are tied to their context. For example, when a toggle button changes state, the event is not simply ‘change,’ but ‘change’ and the value of the toggle button’s state ( ‘on’ or ‘off’).

The most basic way to connect and disconnect an event handler is with the EventEmitter’s  and   methods. In the following example, the  method is used to connect an   event handler to a toggle button, which is defined in the example as well.

Often, the  and   methods are used to connect and disconnect multiple event handlers to objects. The following example illustrates these methods.

For more details about EventEmitter, please see OOjs/Events.