# How KVO options really works (.old and .new)?

**URL:** <https://forums.kodeco.com/t/how-kvo-options-really-works-old-and-new/188179>\
**Category:** Combine: Asynchronous Programming with Swift\
**Created:** [June 10, 2023, 5:16pm UTC](https://forums.kodeco.com/t/how-kvo-options-really-works-old-and-new/188179 "2023-06-10T17:16:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![gugapc](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/gugapc/32/102075_2.png) [@gugapc](https://forums.kodeco.com/u/gugapc)\
**Post date:** [June 10, 2023, 5:16pm UTC](https://forums.kodeco.com/t/how-kvo-options-really-works-old-and-new/188179/1 "2023-06-10T17:16:55Z")

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I don’t understand how .old and .new options work. Would anyone have an example to show?