Since events are stateless, a mechanism is required to share data between event handlers.

In the inline model, event handlers are added as attributes of elements.

In the traditional model, event handlers can be added/removed by scripts.

As you can see in the example, there is a structure around a click event handler.

To add two numbers, storage outside the event handler must be used.

This is a function that checks for the occurrence of events, and then calls the matching event handler to process it.

It is a communication bus and also an event handler.

Understand events, including how they 'bubble' and the features of the object that is passed to most event handlers.

Scripts can be used in a variety of methods including event handlers and directly on web pages.

The property uses an event handler to retrieve information from a worker.