JS Built-ins
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AsyncPatternsintermediate

Promise.reject() returns a Promise

📖 Usage Example
const p = Promise.reject(new Error('oops'));
p instanceof Promise; // true

Promise.reject() creates a rejected Promise from an error or value.

Promise.reject()

Promise.reject('error') creates a rejected Promise.

Challenge: Verify that Promise.reject() returns a Promise instance (catch the rejection to avoid unhandled rejection).

💡 Hints (2)
  • • Promise.reject() returns a Promise.
  • • Always attach .catch() or .then() to prevent unhandled rejections.