ReaKt

INFO

ReaKt is currently in beta and may have minor API changes.

ReaKt is a reactivity library for Kotlin based off of SolidJS. It currently includes Signals, Memos, Effects, and can be extended on very easily with ReactiveContexts and EventPublishers.

Installing

The repository can be found here

Dependency

• Group: net.bladehunt
• Artifact ID: reakt
• Published versions can be found here

Signals

Signals are simple data stores that publish events to its subscribers upon updates. They are automatically subscribed to by ReactiveContexts.

Usage:

// Signal Delegation
val signal = Signal(0)
Effect {
    val value by signal
    println(value) // 0, 1,...5
}
var value by signal
for (i in 1..5) {
    value = i
}

// Invoking
val signal = Signal(0)
Effect {
    println(signal()) // 0, 1,...5
}
for (i in 1..5) {
    signal.value = i
}

Effects

Effects are subscribers that execute the function after receiving events. Effects are run once when initialized in order to subscribe to any publishers in the block.

Usage:

var signal = Signal(0)
Effect {
    println(signal()) // Subscription happens here
} // This block will be re-run every time the signal gets updated
for (i in 1..5) {
    signal.value = i
}

Memos

Memos are transformers that take inputs from publishers and produce an output.

Usage:

var signal = Signal(0)
val memo = Memo {
    signal() + 1
} // This block will be re-run every time the signal gets updated, producing a new output
Effect {
    println(memo()) // 1, 2, 3, 4, 5, 6
}
for (i in 1..5) {
    signal.value = i
}