Also known as
A Promise represents a proxy for a value not necessarily known when the promise is created. It allows you to associate dependent promises to an asynchronous action's eventual success value or failure reason. Promises are a way to write async code that still appears as though it is executing in a synchronous way.
Promise pattern is applicable in concurrent programming when some work needs to be done asynchronously and:
- code maintainablity and readability suffers due to callback hell.
- you need to compose promises and need better error handling for asynchronous tasks.
- you want to use functional style of programming.
Real world examples
- Async Method Invocation