I want my browser tab to know when it has been duplicated.
The only similar solutions I've seen focus on just the duplicated tab knowing it's been duplicated or the original tab knowing it's been duplicated but this only works on Chrome.
Requirements:
Bonus if the solution:
You can make use of Broadcast Channel API .
onmessage event, capture the message and if it matches the initial one, broadcast another const broadcast = new BroadcastChannel('test')
broadcast.postMessage('I am First');
broadcast.onmessage = (event) => {
if (event.data === "I am First") {
broadcast.postMessage(`Sorry! Already open`);
alert("First Tab");
}
if (event.data === `Sorry! Already open`) {
alert("Duplicate Tab");
}
};