How keep the order of items in an object

It gets an object with quite specific keys from the backend. I have to change some values ​​but only to the property where I should break. However, I must keep the order.
The code below works, but I have a problem in my project – different browser? Don’t know. "For of" starts from key "14D". How can I be sure, how can I keep order? Because of specific keys, I cannot sort it.

let updatedData = {};
const dataFromBd = {
  '1M': {
    name: 'anna'
  '1Y': {},
  '2Y': {},
  '3M': {},
  '3Y': {},
  '4Y': {},
  '5Y': {},
  '6M': {},
  '7Y': {},
  '10Y': {},
  '14D': {},
  '15Y': {},
  '>20Y': {}

for (let [key, value] of Object.entries(dataFromBd)) {
  updatedData[key] = 'hello';
  if (key === '10Y') break;

console.log('data', updatedData);

51 thoughts on “How keep the order of items in an object”

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