Chaining & Error Handling

A well-structured Promise chain handles both success and failure paths cleanly. The .finally() method always runs regardless of outcome.

function fetchUser(id) {
  return new Promise((resolve, reject) => {
    if (id > 0) resolve({ id, name: "User " + id });
    else reject(new Error("Invalid ID"));
  });
}

fetchUser(3)
  .then(user => console.log(user.name))
  .catch(err => console.log("Error:", err.message))
  .finally(() => console.log("Done"));

FINAL CHALLENGE

Create a Promise that resolves with "Success". Chain .then() to print it, and .finally() to print "Complete".

Need a hint?

Chain .then(v => console.log(v)).finally(() => console.log("Complete")).

Expected Output:

Success
Complete