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An observable is one of the key components of [[reactive programming]] and was a proposed standard for managing asynchronous data in [[ECMAScript]] 2017. An observable can be defined as a collection where data arrives over time and thus opening up a channel for continuous asynchronous communication. The concept of observables is based on the classic observer design pattern, one or many observer's can subscribe to the observable and get notified whenever the observable is updated.<ref>http://reactivex.io/documentation/observable.html</ref>
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