Salesforce Console Developer Guide
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lightning__tabFocused
A Lightning message channel that corresponds to the lightning:tabFocused Aura app event. This message channel is available for
Lightning web components used within a Lightning console app.
By default, this event is only received when that component's tab comes into focus, not when it leaves focus. To receive all events and minimize performance impact, use a utility item as the only listener.
Response
The response is the same as that of the lightning:tabFocused Aura app event.
LWC Example
Import the lightning__tabFocused message channel from the @salesforce/messageChannel/ scoped module. The event returns the message in the response.
For more information, see Subscribe and Unsubscribe from a Message Channel.