JS Bin// source http://jsbin.com/savexuv

jsbin.savexuv.js

// Destructuring nested object

var car = {
  model: 'bmw 2018',
  engine: {
    v6: true,
    turbo: true,
    vin: 12345
  }
}

const modelAndVIN = ({model, engine: {vin}}) => {
  console.log(`model: ${model} vin: ${vin}`);
}

modelAndVIN(car);

// merge objects

let object1 = { a:1, b:2, c:3 }
let object2 = { b:30, c:40, d:50}
let merged = {...object1, ...object2} //spread and re-add into merged
console.log(merged); // {a:1, b:30, c:40, d:50}