Example 2-13. Rejecting a promise by throwing an error in the constructor callback

rejectWith('bad news').then(
	function step2() {
		console.log('This is never run');
	}
).catch(
	function (error) {
		console.log('Foiled again!');
		console.log(error); // Error object with message: 'bad news'
	}
);

function rejectWith(val) {
	return new Promise(function (resolve, reject) {
		throw Error(val);
		resolve('Not used'); // This line is never run
	});
}

// Console output:
// Foiled again!
// [Error object] { message: 'bad news' ... }