We now have a YouTube Channel. 
Visit complete Angular roadmap

← Back to Topics List

Observable lifecycle

An observable is a function that acts as a wrapper for a data stream. They support to pass messages inside your application. An observable is useless until an observer subscribes to it. An observer is an object which consumes the data emitted by the observable. An observer keeps receiving data values from the observable until the observable is completed, or the observer unsubscribes from the observable. Otherwise observers can receive data values from the observable continuously and asynchronously. So we can perform various operations such as updating the user interface, or passing the JSON response.

There are 4 stages for a life cycle of an observable.

  • Creation
  • Subscription
  • Execution
  • Destruction

Visit the following resources to learn more:

Community

roadmap.sh is the 6th most starred project on GitHub and is visited by hundreds of thousands of developers every month.

Roadmaps Guides Videos About YouTube

roadmap.sh by Kamran Ahmed

Community created roadmaps, articles, resources and journeys to help you choose your path and grow in your career.

© roadmap.sh · FAQs · Terms · Privacy

ThewNewStack

The leading DevOps resource for Kubernetes, cloud-native computing, and the latest in at-scale development, deployment, and management.