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# defer

![defer](http://reactivex.io/documentation/operators/images/defer.png)

Returns an observable sequence that invokes the specified factory function whenever a new observer subscribes.

## Arguments

1. `observableFactory` *(`Function`)*: Observable factory function to invoke for each observer that subscribes to the resulting sequence.

## Returns

*(`Observable`)*: An observable sequence whose observers trigger an invocation of the given observable factory function.

## Example