getByPath

getByPath.js

export function getByPath(
  path: string[] | string,
  obj: Record<string, any>,
  separator = "."
) {
  const properties = Array.isArray(path) ? path : path.split(separator);
  return properties.reduce((acc: Record<string, any>, item: string) => {
    return acc[item];
  }, obj);
}

const data = {
  key1: {
    key11: {
      key111: "345"
    },
    key12: "123"
  }
};

console.log(getByPath(["key1", "key11", "key111"], data));