assign-properties

assignProperties

An Object.assign like utility that preserve descriptors, as in accessors or value, or configurable, or writable, etc.

import assignProperties from 'assign-properties';
const assignProperties = require('assign-properties');
// <script src="https://unpkg.com/assign-properties">

Same Object.assign API

// the issue with assign is that copies are values
const before = Object.assign({}, {get random() { return Math.random() }});

// mixins are broken this way
before.random === before.random; // true

// with assignProperties, everything is fine
const after = assignProperties({}, {get random() { return Math.random() }});

// the getter is passed along instead of being lost in the process
after.random === after.random; // false

Object spread suffers the same issue

const base = {get random() { return Math.random() }};
const spread = {...base};
spread.random === spread.random; // true

So, if you want to bring accessors to the mix, this module is your stop.