Extend objects by assigning properties.

object_assign_recipe.js

// Copy an object by extending an empty object:
Object.assign({}, {
  apples: 12,
  oranges: 12
})
  //=> { apples: 12, oranges: 12 }

// Extend one object with another:
const inventory = {
  apples: 12,
  oranges: 12
};

const shipment = {
  bananas: 54,
  pears: 24
}

Object.assign(inventory, shipment)
  //=> { apples: 12,
  //     oranges: 12,
  //     bananas: 54,
  //     pears: 24 }