Multiplatform library for building reactive applications with state management, data observation, error handling, and coroutines integration, inspired by Solid.js, featuring reactive data "lensing."
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Kotlin Multiplatform reactivity tools.
Reactive is a multiplatform Kotlin library for building reactive applications. It is inspired by concepts from Solid.js, and provides a set of core abstractions and utilities for managing state, observing changes, and composing reactive data flow.
Some of the features of Reactive include:
The core of Reactive is the Reactive<T> interface, which represents a reactive value that can be observed for changes
in state. The state of a Reactive not only communicates data, but also loading and error states. Reactive data can
be bound to a ReactiveContext, which handles all the observation, loading checks, and resource management for you.
As of now there isn't any official documentation for Reactive, but a good introduction to Reactive in action can be found here.
Simple example of reactive data:
val counter = Signal(0) // Signal is the most basic Reactive value. It's a container that notifies listeners when changed.
AppScope.reactive {
// ReactiveContexts are bound to kotlin CoroutineScopes
// AppScope is a provided top-level scope that lives as long as the app is running.
println("Count is now: ${counter()}") // Reactive data is bound to the scope using the `invoke()` operator.
}
fun {
counter.value =
counter.value =
}
Support for loading states:
val wait = LateInitSignal<String>() // LateInitSignal is like Signal, but starts in a loading state until set
AppScope.reactive {
println(wait()) // context will stay loading until wait has a ready value
}
fun go() {
wait.value = "Okay, stop loading now." // prints "Okay, stop loading now."
}
Interoperability with kotlinx-coroutines:
val data: Flow<Int> = flow {
repeat(10) {
delay(1000)
emit(it)
}
}
AppScope.reactive {
println(data()) // prints "1", "2", ..., "9" delaying one second between each
}