Promised version of getting user's geolocation

geolocation.js

function getPositionPromised() {
  function successCb(resolve) {
    return position => resolve(position);
  }

  function errorCb(reject) {
    return () => reject('Could not retrieve geolocation');
  }

  return new Promise((resolve, reject) => {
    if (window.navigator.geolocation) {
      navigator.geolocation.getCurrentPosition(successCb(resolve), errorCb(reject));
    } else {
      return reject('No geolocation support');
    }
  })
}

//You can use it like this:
getPositionPromised()
  .then(position => {/*do something with position*/})
  .catch(() => {/*something went wrong*/})