JavaScript Promises Cheat Sheet

Promise Creation

const promise = new Promise((resolve, reject) => {
  if (success) resolve(data);
  else reject(error);
});

Promise Methods

promise.then(data => console.log(data));
promise.catch(error => console.error(error));
promise.finally(() => console.log("Done"));

Async/Await

async function fetchData() {
  try {
    const data = await fetch(url);
    return await data.json();
  } catch (error) {
    console.error(error);
  }
}