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Repovive

Introduction to Promises - Asynchronous JavaScript | JavaScript | Repovive

Repovive.

JavaScript22 sections · 783 units18h total

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Introduction to Promises

A better way to handle async

A Promise represents a future value. It's either pending (waiting), fulfilled (success), or rejected (failed).

const promise = fetchData();

promise.then((data) => {
  console.log("Success:", data);
});

promise.catch((error) => {
  console.log("Failed:", error);
});

Promises flatten callback hell into a chain of .then() calls.