JSFiddle - React, Tailwind, and code Playground

by Aleksandr Zidyganov

JavaScript

async function checkWorldTime() {
  const response = await fetch('https://worldtimeapi.org/api/timezone/UTC');
  const data = await response.json();
  const worldTimestamp = data.unixtime * 1000;
  const localTimestamp = Date.now();
  
  return worldTimestamp - localTimestamp; // Разница в миллисекундах
}

console.log(await checkWorldTime(), 'разница')