deeploop_object.js

// print key-values of an object recursively 

function flattenObject(obj) {
  for (let key in obj) {
    if (typeof obj[key] === 'string') {
      console.log(key, obj[key]);
    }
    if (typeof obj[key] === 'object') {
      flattenObject(obj[key]);
    }
  }
}