Deeply object merge

deepMerge.js

function isObj(val){
  return val !== null && typeof val === "object";
}

function recurse(acc, obj){
  for (var p in obj) {
    acc[p] = isObj(obj[p]) ? recurse(acc[p] || {}, obj[p]) : obj[p];
  }
  
  return acc;
}

export default function deepMerge() {
  var args = Array.prototype.slice.call(arguments);
  
  return args.reduce(recurse, {});
}