迭代进口JSON object

Question

I have problem with iterate of JSON imported object

    import * as countries from "all-countries-and-cities-json";

// obj with 152 keys, looks like:
//
// {
//   "Afghanistan": [
//     "Herat",
//     "Kabul",
//     "Kandahar",
//     "Molah",
//     "Rana",
//     "Shar",
//     "Sharif",
//     "Wazir Akbar Khan"
//   ],
//   "Albania": [
//     "Elbasan"...

    console.log(Object.keys(countries).length); // return 153 (152 + 'default')
    console.log(Object.keys(countries).pop()); // return 'default'

How to import this without key "default"?

Here is tsconfig.json

{
  "compilerOptions": {
    "esModuleInterop": true,
    "resolveJsonModule": true,
  }
}

You can see this behavior in this live example where a default property is added to the object.

Answer 1

In order to not get a default entry in the object, import from JSON files using this syntax:

import countries from "all-countries-and-cities-json";

It works in Node.js, I don't know about other runtimes.