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When Firebase RemoteConfig fetch is invoked, the closure gets called asynchronously when the data is available. After the initial result is returned, does the closure keep listening for changes or de we have to call fetch again?
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Using the Remote Config background function triggering provided by Cloud Functions for Firebase along with FCM, you can propagate Remote Config updates in real-time.
Firebase Remote Config is a cloud service that lets you change the behavior and appearance of your app without requiring users to download an app update. When using Remote Config, you create in-app default values that control the behavior and appearance of your app.
I am afraid there is no listener for further changes.
If you want to listen to changes in real time you need to propagate the change through some notification mechanism: Firebase provides an official guide on this.
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