!PlayFrame

Evolve

###### 0.16 kB Deep calling assign

Installation

``sh
npm install --save @playframe/evolve
`

Usage

`js
import evolve from '@playframe/evolve'

const props = {onclick: (event)=> fetch()}

const clickLogger = { onclick: (handler)=>(e)=>
console.log(e)
handler && handler(e);
}

const loggedClicksProps = evolve(props, clickLogger);
`

Annotated Source

Caching Array.isArray` for perf

{isArray} = Array

Exporting a deep assign that passes old values to functions

module.exports = evolve = (base, upgrade)=>
evolved = {base...}

for k, v of upgrade
type = typeof v
evolved[k] = if type is 'function'
v base[k]

else if type is 'object' and not isArray v
evolve base[k], v

else
v

evolved