Adds an event handler to this event endpoint.
"keyboardEvent_var" is a variable referencing a KeyboardEvent object. |
"keyboardEvent_var" is a variable referencing a KeyboardEvent object. |
| Type | Description |
| boolean | Returns true if the handler was successfully added to the set of event handlers. |
| Name | Type | Description |
| handler | KeyboardEventHandler | The client implemented KeyboardEventHandler to be called when this event is triggered. |