What is the difference between Promises and Observables?

Question

What is the difference between Promise and Observable in Angular?

An example on each would be helpful in understanding both the cases. In w

Answer 1

Short answer :

Observable is better, it has all Promises features plus extra features.

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Long answer:

Promises:

• One Time Use "Return data once"
• No cancel
• One listener
• No Socket Support One Listener

Observable:

• Return Data many times as data change
• Support cancel
• Support socket
• Support many Listener and notify them when data change
• Support map, filter, reduce