Lesson 17 / 30

Promises in Node

Use Promise-based built-in APIs and Promise.all to run async operations concurrently.

Native Promise APIs

Many built-ins now ship a Promise-based version directly — no wrapping needed.

import { readFile } from "node:fs/promises";

readFile("notes.txt", "utf8")
  .then((data) => console.log(data))
  .catch((err) => console.error("Failed:", err.message));

Promise.all for parallel work

Promise.all runs several async operations concurrently and waits for all of them to finish.