Create a simple Observable class that implements the observer pattern. The class should:
- Allow subscribing to data changes via a subscribe method
- Notify all subscribers when data changes via a notify method
- Allow unsubscribing from updates
- Maintain a list of subscriber callbacks
const observable = new Observable();
// Subscribe to changes
const subscription = observable.subscribe(data => {
console.log('Received:', data);
});
// Notify subscribers
observable.notify('Hello!'); // logs: "Received: Hello!"
// Unsubscribe
subscription.unsubscribe();
// No longer logs anything
observable.notify('Hello again!');Found similar question on PrepareFrontend
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