recursiveObjectKeysPaths.js

const createKeyPath = function (currentKeyPath, key) {
  return currentKeyPath + (currentKeyPath ? '.' : '') + key;
};

function recursiveObjectKeysPaths(obj, path = '') {
  if (!obj || typeof obj == 'string') return;
  let keys = [];
  let currentPath;

  if (Array.isArray(obj)) {
    for (let i = 0; i < obj.length; i += 1) {
      currentPath = createKeyPath(path, (i).toString());
      const subKeys = recursiveObjectKeysPaths(obj[i], currentPath);
      if (subKeys && Array.isArray(subKeys) && subKeys.length) currentPath = subKeys
      
      keys = keys.concat(currentPath);
    }
  } else {
    for (let key in obj) {
      if (obj.hasOwnProperty(key)) {
        currentPath = createKeyPath(path, key);
        const subKeys = recursiveObjectKeysPaths(obj[key], currentPath);
        if(subKeys && Array.isArray(subKeys) && subKeys.length) currentPath = subKeys
        
        keys = keys.concat(currentPath);
      }
    }
  }

  return keys;
};