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Difference between observables and promises in AngularJS? What are the changes with respect to promises and observables in angular 2 and angular 4 versions? Examples that explain this scenario would help a lot.

NightLight
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Promise can handle only a single async task wheras observable can handle multiple of them with more features.

Please see this answer.

Charlie
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    Instead of answering and linking to an answer, mark question as duplicate instead.... – AT82 Dec 19 '17 at 10:37