off
function
off()
| Option name | Type | Description |
|---|---|---|
| eventName | String | Name of event, one of listed above |
| handler | Function | callback for event |
removes a listener for the specified event
It will unsubscribe at most, one instance of a listener for a particular event.
If any single listener has subcribed multiple times to the same event,
then off must be called multiple times.
Supported events:
addupdateremovechange
function off (state, eventName, handler) {
state.emitter.removeListener(eventName, handler)
return this
}