CODE EXAMPLE FOR JAVASCRIPT

merge objects javascript es6

const response = {
  lat: -51.3303,
  lng: 0.39440
}

const item = {
  id: 'qwenhee-9763ae-lenfya',
  address: '14-22 Elder St, London, E1 6BT, UK'
}

const newItem = { ...item, location: response }; // or { ...response } if you want to clone response as well

console.log(newItem );