const upload = new Promise((resolve) => {
  setTimeout(() => resolve("Файл загружен"), 200);
});
upload.then((text) => console.log(text));
console.log("Ждём…");

Promise.resolve(220)
  .then((price) => price * 2)
  .then((total) => console.log(total));

Promise.reject(new Error("Сеть недоступна"))
  .catch((e) => console.log("Увы:", e.message));

Promise.resolve("ок").finally(() => console.log("Спиннер скрыт"));

Promise.all([Promise.resolve(1), Promise.resolve(2)]).then((r) => console.log(r));