fetch('https://jsonplaceholder.typicode.com/todos/1')
  .then((response) => response.json())
  .then((json) => console.log(json));

➜ node index.js

(node:30887) ExperimentalWarning: The Fetch API is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
{ userId: 1, id: 1, title: 'delectus aut autem', completed: false }

export const sum = (a, b) => a + b;

import test from 'node:test';
import assert from 'node:assert/strict';
import { sum } from './index.mjs';

test('sum', async (t) => {
  await t.test('true', () => {
    assert.equal(sum(2, 8), 10);
  });
  await t.test('false', () => {
    assert.notEqual(sum(2, 5), 8);
  });
});

➜ node test.mjs

TAP version 13
# Subtest: sum
    # Subtest: true
    ok 1 - true
      ---
      duration_ms: 0.621862
      ...
    # Subtest: false
    ok 2 - false
      ---
      duration_ms: 0.135985
      ...
    1..2
ok 1 - sum
  ---
  duration_ms: 3.034993
  ...
1..1
# tests 1
# pass 1
# fail 0
# cancelled 0
# skipped 0
# todo 0
# duration_ms 7.669003

node --watch index.js

import json from './package.json' assert { type: 'json' };
console.log(json);