Adds an event handler to this event endpoint.
"keyboardEvent_var" is a variable referencing a KeyboardEvent object.
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"keyboardEvent_var" is a variable referencing a KeyboardEvent object.
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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. |