Get Deeply Nested Value in JavaScript

get.ts

/**
 * @param {Object} object
 * @param {string|Array<string>} path
 * @param {*} [defaultValue]
 * @return {*}
 */
export default function get(object, path, defaultValue) {
  const path = Array.isArray(pathParam) ? pathParam : pathParam.split('.');

  let index = 0;
  let length = path.length;
  let object = objectParam;

  while (object != null && index < length) {
    object = object[String(path[index])];
    index++;
  }

  const value = index && index === length ? object : undefined;
  return value !== undefined ? value : defaultValue;
}