let url = 'https://maps.googleapis.com/maps/api/geocode/json?address=london'

​

fetch(url)

  .then(response => response.json())

  .then(data => {

    console.log(data.results[0].geometry.location.lat)

    console.log(data.results[0].geometry.location.lng)

  })

​

​

// 51.5073509

// -0.1277583

​

function getLatitudeOrLongitude(url, LatitudeOrLongitude) {

  return fetch(url)

    .then(response => response.json())

    .then(data => {

      if (LatitudeOrLongitude === 'latitude')

        return data.results[0].geometry.location.lat

      else

        return data.results[0].geometry.location.lng

    })

}

​

let latitudeOfLondon = getLatitudeOrLongitude(url, 'latitude')

​

console.log(latitudeOfLondon)

​

// undefined