Tutorial: obj.apply

Require javascript-object-paraphernalia

var obj = require('javascript-object-paraphernalia')

Define some objects for use with the following examples

var exampleFirst = {
      fruit: "Apple",
      animals: {
        firstAnimal: "Beaver"
      }
    },
    exampleSecond = {
      fruit: "Banana",
      animals: {
        firstAnimal: "Slow Loris",
        secondAnimal: "Elephant"
      },
      gems: {
        firstGem: "Diamond"
      }
    };

Use obj.apply to apply the properties of the second example object on the first example object

exampleSecond.animals.firstAnimal = "Slow Loris"
obj.apply(exampleFirst, exampleSecond)

The contents of the first object are:-

{
  fruit: "Banana",
  animals: {
    firstAnimal: "Slow Loris"
  }
}

See that only the first example's properties have been deeply updated and none of the additional properties present on the second object have been applied.