Promise.reject

The Promise.reject(reason) method returns a Promise object that is rejected with the given reason.

Syntax

Promise.reject(reason);

Parameters

reason

Reason why this Promise rejected.

Return value

A Promise that is rejected with the given reason.

Description

The static Promise.reject function returns a Promise that is rejected. For debugging purposes and selective error catching, it is useful to make reason an instanceof Error.

Examples

Using the static Promise.reject() method

Promise.reject(new Error('fail')).then(function(error) {
  // not called
}, function(error) {
  console.log(error); // Stacktrace
});

Specifications

Specification	Status	Comment
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Promise.reject' in that specification.	Standard	Initial definition in an ECMA standard.
ECMAScript 2017 Draft (ECMA-262) The definition of 'Promise.reject' in that specification.	Draft

Browser compatibility

See also

• Promise
• Selective error catching using the BlueBird Promise library