EffeKt

Kotlin reactive library inspired by Vue.js. It seeks to provide reactive primitives to kotlin for building functionally coupled systems.

Quick Start

In your build.gradle.kts file:

repositories {
    //...
    maven { url = URI("https://jitpack.io") }
}

dependencies {
    implementation("com.github.bendgk:effekt:1.0.0")
}

Usage

EffeKt brings the following reactive primitives from vue to kotlin:

• ref
• computed
• watchEffect

ref

A ref is a reactive primitive that can be read and written to. Ref's store a single value and a list of subscribers. When a ref is used as a dependency of another primitive (such as computed or watchEffect), that primitive is added as a subscriber to that ref. when a ref is updated we need to update all the subscribers too.

computed

A computed is a reactive primitive that can only be read. Whenever a computed value is read its value is recomputed according to its dependencies.

watchEffect

watchEffect is a reactive helper function that can watch dependencies for changes. It runs the given side effect when a dependency change occurs.

Example

var price by ref(2.00)
var quantity by ref(1000)
val revenue by computed { price * quantity }

watchEffect {
    println("revenue: $revenue")
}

price /= 2
price *= 10
quantity += 500

Output:

> revenue: 2000.0
> revenue: 1000.0
> revenue: 10000.0
> revenue: 15000.0