graph-reducer

Graph-Reducer

Something like lodash.merge() (a recursive version of Object.assign()) that specially designed for graph-stater.

It additionally supports functions (in payload(s) argument(s)) to make it possible to transform properties based on their previous states/values.

It also deeply compares the source state (source object) with the primary result (newState), during its original process and returns an additional value (noTransform) that shows the result of this comparison.

Installation

npm i graph-reducer

or using yarn:

yarn add graph-reducer

Usage

import graphReducer from 'graph-reducer'

const srcState = {
    a: 'a',
    n: 10,
    v: {c: 'c'}
}

const payload = {
    a: 'A',
    v: {c: 'C'},
    n: n => n * 2,
}

const {newState} = graphReducer(srcState, payload)

assert.deepStrictEqual(newState, {  // import assert from 'assert' // https://nodejs.org/api/assert.html
    a: 'A',
    n: 20,
    v: {c: 'C'}
})

License

MIT © Mir-Ismaili