Flatten array of objects in javascript

flatten_object_array.js

// Recursive flatten function (Doesn't flatten arrays)
function flatten(obj, target){
  for(const key in obj){
    if(obj.hasOwnProperty(key)){
      if(!Array.isArray(key) && typeof(obj[key]) === "object" && obj[key] !== null){
        flatten(obj[key], target);
      }else{
        target[key] = obj[key];
      }
    }
  }
  return target;
}

// Example usage

(async () => {
  const data = await fetch("https://randomuser.me/api/?results=5");
  const json = await data.json();
  console.log(json.results.map(x => flatten(x.location, {})))
})()