# Observable and Vetoable delegates

DevFeed: [Observable and Vetoable delegates](<https://devfeed.tech/articles/observable-and-vetoable-delegates-39212.md>)

Original publisher: [Read original article](<https://kt.academy/article/ak-observable-vetoable>)

Published: 2023-05-02T00:15:00Z

Content type: tutorial

Language: en

Sources: [Kt. Academy](<https://devfeed.tech/sources/kt-academy.md>)

Topics: [Kotlin](<https://devfeed.tech/topics/kotlin.md>), [properties](<https://devfeed.tech/topics/properties.md>), [function](<https://devfeed.tech/topics/function.md>)

Tags: [kotlin](<https://devfeed.tech/tags/kotlin.md>), [logs](<https://devfeed.tech/tags/logs.md>), [properties](<https://devfeed.tech/tags/properties.md>), [workshop-learning-programming](<https://devfeed.tech/tags/workshop-learning-programming.md>)

## AI overview

A tutorial on Kotlin observable and vetoable delegates, explaining how property changes can trigger actions, update views, log changes, and influence application state.

## Source excerpt

What are observable and vetoable delegates, and what are their real-life use cases.