JavaScript .reject()

Returns a rejected Promise object with a given reason.

Syntax

Promise.reject(reason);

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The reason can be most data types, including:

• numbers
• strings
• objects ( ones of type Error recommended for improved error-catching)

Example

A new Promise, myPromise, is rejected with an Error message by default. Lastly, the error message, err.message, is logged to the console through the catch-block.

const myPromise = Promise.reject(new Error('Promise rejected'));

myPromise.catch((err) => {
  console.log(err.message); // Output: Promise rejected
});

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Codebyte Example

The example below demonstrates rejecting a promise with a string value as the given reason.

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